November 8, 2021

Incident at AUPALUK QC (CYLA) (ATM - inaccurate aeronautical information)

The Québec City flight information centre (FIC) reported that the runway surface condition (RSC) fax for Aupaluk, QC (CYLA) indicated "trace" as the depth of dry snow. The second page of the fax was also missing. The NOTAM was issued with 1/8 inch. A fax was sent to the operator advising of the change and requesting that the second page be included at all times even if it does not contain any additional information.

October 14, 2021


A persistent emergency locator transmitter (ELT) signal was heard intermittently on the emergency frequency in the Montreal/St-Hubert, QC (CYHU) tower for more than 10 minutes. Sûreté du Québec was advised. The pilot of an Aéroclub de Montréal Inc. Cessna 150M (C-GJCV) confirmed that they could also hear it on the radio of their aircraft on the downwind to the left on Runway 24L. No other impact.

June 7, 2021

Incident at 20NM NNW LA TUQUE QC (CYLQ)

A Chartright Air Bombardier CL-600-2B16 (HRT085) from Montreal/St-Hubert, QC (CYHU) to Edmonton, AB (CYEG) reported hearing a "Mayday" call on the guard frequency from an Exact Air Cessna R182 (C-GBSC) with an engine failure. This aircraft was not in communication with Toronto (YYZ) air traffic control (ATC) and there was no flight plan on file. The Joint Rescue Coordination Centre (JRCC) Trenton was notified and indicated that Bagotville (YBG) had also heard the call. Numerous attempts by aircraft to contact C-GBSC were unsuccessful. No operational impact. At 2138Z, JRCC advised that C-GBSC had landed safely.
UPDATE: TSB Report #A21Q0036: An Exact Air Cessna R182 (C-GBSC) was on a visual flight rules flight from Lachute, QC (CSE4) to Manic-5, QC (CMN5), with only the pilot on board. While the aircraft was in cruising flight at an altitude of 3000 feet ASL, at approximately 20NM north northwest of La Tuque, the engine lost power. The pilot actioned the emergency checklist and issued a “MAYDAY” call. After the carburetor heat was activated, the engine ran rough a few times and then normal power returned. The aircraft landed at the St-Honoré, QC (CYRC) airport, where an inspection was performed and no failures were detected. (Duplicate CADORS 2021O0652 deleted after information merge.)

April 7, 2021

Incident at 4542N / 07339W (Laser interference)

Delayed entry as a result of NAV CANADA safety and evaluation quality assurance (QA) review: In the Terrebonne, QC area, a citizen observed several yellow, green and white lights in the sky. The estimated height is the height at which aircraft heading for Montreal/Pierre Elliott Trudeau, QC (CYUL) transit. Also, a small aircraft was observed below said lights at the same time.

May 16, 2021


A WestJet Encore Ltd. de Havilland DHC-8-402 (C-FWEZ/WEN3543) from Montreal/Pierre Elliott Trudeau, ON (CYUL) to Toronto/Lester B. Pearson, ON (CYYZ) was cleared to 5,000 feet. After briefly levelling off, the aircraft was observed at 5500 feet, 2.5NM behind a Jazz Bombardier CL-600-2D24 (C-GOJZ/JZA8970) from Ottawa/Macdonald-Cartier, ON (CYOW) to Montreal/Pierre Elliott Trudeau, QC (CYUL).
UPDATE from Flight Operations: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. Shortly after departure, the crew was made aware of potential conflicting traffic 1000ft above their assigned altitude. Visual confirmation of the traffic was made by the crew. At the time of acknowledging and passing the conflicting traffic, the crew was assigned a heading by air traffic control (ATC). The pilot that was flying, upon hearing the instruction given by ATC, began to both initiate the turn (as directed), but also self-initiated a climb. The climb was initiated in error due to the flying pilot anticipating a higher altitude because the potential traffic no longer posed a threat. The flying pilot quickly realized their error, and elected to gradually level off for guest comfort. The 400ft deviation in altitude can be attributed to the gradual altitude capture rather than an abrupt one (again, because the conflicting traffic posed no threat). The Flight Safety Standards pilot debriefed with the flight crew following the event, and reviewed the following contributing factors leading to the altitude deviation, which included: expectation of being assigned a clearance (i.e. confirmation bias); role transfer and the subtle disorientation operating from a seat not commonly occupied by the Pilot Flying (PF); and a lightly loaded aircraft, namely in increased climb performance.

May 1, 2021


A Montreal Flying Club Inc. Cessna 150L (C-FBOF) from Montreal/St-Hubert, QC (CYHU) to Montreal/St-Hubert, QC (CYHU) reported an emergency locator transmitter (ELT) signal on the ground. The signal was also heard on the towers emergency radio. No impact on operations.

April 5, 2021


A 2737-5633 Quebec Inc. Cessna 172N (C-GWOB) from Montreal/Les Cèdres, QC (CSS3) to Ottawa/Gatineau, QC (CYND) had to execute an evasive manoeuvre immediately after take-off at CSS3 to avoid a collision with a privately registered Piper PA-28-140, which had integrated into the circuit on final on the opposite runway. The Piper PA-28-140 remained in the CSS3 circuit for at least an hour after the first event. Several other aircraft also reported unsafe manoeuvres as well as confusion with the intentions and communications of the Piper PA-28-140.

April 10, 2021


At 1033Z, a Jazz de Havilland DHC-8-402 (JZA8701) from Quebec/Jean Lesage, QC (CYQB) to Montreal/Pierre Elliott Trudeau, QC (CYUL) initiated a missed approach for Runway 06R due to an indication of a landing gear problem. At 1104Z, JZA8701 declared a "PAN PAN" and emergency services were deployed. The aircraft landed safely at 1122Z and left the runway at 1203Z. No impact on operations.
UPDATE: TSB Report #A21Q0018: C-GGOY, a Dash 8-402 operated by Jazz Aviation under the callsign JZA8701, was on an instrument flight rules flight from Quebec/Jean Lesage, QC (CYQB) to Montreal/Pierre Elliott Trudeau, QC (CYUL) with 3 crew members and 34 passengers on board. While the aircraft was on final approach for Runway 06R at CYUL, the "Left Gear Unsafe" light illuminated when the landing gear was selected for the extended position. The crew ascended and an emergency (PAN PAN) was declared. The Quick Reference Handbook (QRH) checklist was completed and the light remained on. The aircraft touched down on Runway 06R safely and the aircraft came to a stop. The landing gear was secured and the aircraft was towed to the boarding gate.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. During approach, the flight crew received a "left" red Main Landing Gear (MLG) unsafe warning indication. The Quick Reference Handbook (QRH) was reviewed and an alternate gear extension was performed, with the same result. The alternate gear extension verification light was also indicating an unsafe condition. An emergency was declared. After burning off excess fuel and repositioning passengers in the cabin, the aircraft landed without further incident, stopping on the runway. Maintenance confirmed that the left MLG was not in a locked position. The gear was physically moved to a locked position and secured with a ground lock safety pin. The aircraft taxied to its assigned gate, where passengers deplaned. Following troubleshooting, the left MLG downlock actuator was replaced and the system tested serviceable. The aircraft was returned to service following a successful test flight. Service Difficulty Report No. 20210414003 was submitted

January 10, 2021


A privately registered, amateur-built Viking Dragonfly entered Class C airspace of Mirabel without establishing communication. The aircraft also entered active CYR601 restricted airspace without clearance from the responsible authority. No impact on operations.

May 1, 2021

Incident at South Pender Island, BC

Aviation Incident Report #17074: An individual reported that an Ocean Air Floatplanes Cessna 180J (C-FERX) on a flight passing over South Pender Island, BC, flew over homes, raptors and migratory wildlife at an altitude of 152 meters. The aircraft also crossed the South Bluffs, over houses, at a low altitude ranging from approximately 50 to 100 meters.

June 16, 2021

Incident at ABBOTSFORD BC (CYXX) (Communication navigation surveillance/air traffic system)

TSB Report #A21P0041: C-GEWR, a de Havilland DHC-8-402, was operating as WestJet Encore flight WEN3233 from Calgary, AB (CYYC) to Abbotsford, BC (CYXX). While on the Hope 3 arrival, and past the ITGIL waypoint, ATS YYJ terminal cleared the flight to OMINO DIRECT MISAR for the RNAV Z 07 approach. This clearance was not in compliance with NAV CANADAs "Manual of Air Traffic Services" and the Aeronautical Information Circular (AIC 12/21) "Procedural Changes To Air Traffic Control Clearances From An Open STAR To Final Approach Course". The clearance was refused by the flight crew and vectors to intercept the approach were requested and provided. There was no further incident and no loss of separation. The operator advised that there was a similar occurrence on the 14th of June, where the flight crew were offered the same non-standard clearance, which was also refused. There was no conflicting traffic and/or loss of separation. The TSB had completed report A21W0023 into an occurrence on the 11th of May, 2021, that involved non-standard ATC phraseology leading to a "Loss of Separation" event.

July 24, 2021


A Pacific Professional Flight Centre Cessna 172M (C-GWOK) on a VFR flight from Vancouver/Boundary Bay, BC (CZBB) to Abbotsford, BC (CYXX) descended below the altitude restriction on the assigned 264th route. The aircraft also did not follow the route.

July 15, 2021

Incident at 5 NM W McKinley landing (Communication navigation surveillance/air traffic system)

A Finnair Ltd. Eurocopter EC135 P2+ (C-FINZ) had called the Kelowna, BC (CYLW) tower in the control zone, heading southbound. The tower was conducting training at the time, and a student had cleared the aircraft southbound at 022ft, which was below the CYLW control zone. During a discussion of why clearances at that altitude are outside the CYLW zone and should not be issued, a Cessna 180 called up on the frequency to inform the tower that C-FINZ had flown over one of their students in a float plane who was conducting circuits on the water. The helicopter climbed and was cleared south once it was in the zone. Audio was reviewed. No impact to operations.
UPDATE from Flight Operations: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. The CASI followed up with the Air Operator and spoke with the pilot (who also provided a written response). The pilot stated they followed all air traffic control (ATC) instructions and clearances. In addition, the pilot stated the other aircraft was visible on the traffic alert and collision avoidance system (TCAS), with sufficient separation between them.

July 14, 2021

Incident at TERRACE BC (CYXT)

An emergency locator transmitter (ELT) signal was heard by the Terrace flight service station (FSS) at 1855Z for 4 seconds. The signal was also reported by an Northstar Avlease Ltd. de Havilland DHC-8-311 (C-GJCN) operating as a Summit Air flight (SU1763) from Terrace, BC (CYXT) to Vancouver, BC (CYVR) that was on the climb out from Runway 15.

June 20, 2021

Incident at 3NM S LANGLEY REGIONAL BC (CYNJ) (Weather balloon, meteor, rocket, CIRVIS/UFO)

When 3NM south of Langley, BC (CYNJ), at 5000 feet, a Pacific Professional Flight Centre Cessna 172N (C-GZTI) from Vancouver/Boundary Bay, BC (CZBB) to Calgary/Springbank, AB (CYBW) reported an unknown black object off its wing. The object was approximately 1-2 meters in length and was also at 5000 feet. No other sightings by other aircraft in the vicinity.

June 21, 2021

Incident at FORT ST. JOHN BC (CYXJ) (Incursion - runway - animal)

An Adventure Aviation Inc. Cessna 172N (C-GXRM) from Fort St. John, BC (CYXJ) to Fort St. John, BC (CYXJ) reported a coyote near the runway intersection upon departure from Runway 21. Airport staff were advised and conducted a wildlife check; no animals were found. Multiple other aircraft were also advised of the coyote.

May 17, 2021


An unknown aircraft with a transponder code of 1200 and an indicated altitude of 2300ft, transited the Nanaimo, BC (CYCD) control zone east to west, entering via Boat Harbour and exiting via the Nanaimo Estuary. The flight service station (FSS) was unable to contact the aircraft on frequency 122.1 MHz. The aircraft was also observed transiting the Nanaimo Harbour aerodrome traffic frequency (ATF) area.

April 2, 2021

Incident at Kelowna

A Coldstream Helicopters Ltd. Bell 212 (C-FAHL) from Kelowna, BC (CYLW) to Kelowna, BC (CYLW) departed for a local test flight and the tower was unable to reach the aircraft to provide traffic information regarding a Southern Interior Flight Centre Cessna 172S (C-GSFC) from Kelowna, BC (CYLW) to Kelowna, BC (CYLW). Also, there was no altitude readout on the transponder. No impact to operations.

February 9, 2021


A Central Mountain Air Ltd. Dornier 328-100 (C-FDYN/GLR8438) from Kelowna, BC (CYLW) to Prince George, BC (CYXS) declared PAN PAN due to an oil indication. The aircraft continued to its destination, where it landed without incident at 1730Z. No operational impact. (Information from Aviation Incident Report (AIRA) incorporated into narrative summary)
UPDATE: TSB Report #A21P0009: C-FDYN, a Central Mountain Air Dornier DO-328 aircraft, was conducting flight GLR8438 from Kelowna, BC (CYLW) to Prince George, BC (CYXS) with 3 crew members and 11 passengers on board. During cruise flight at FL240, the flight crew noticed indications of oil pressure fluctuations on the right engine (Pratt & Whitney Canada PW119B). ATC advised the flight crew that the flight would be required to hold prior to commencing the approach at CYXS due to traffic. The flight crew declared a PAN PAN and landed as soon as practical, without further incident. Subsequent maintenance actions revealed the engines no. 3 and no. 4 bearing labyrinth seals were leaking air and pressurizing the bearing cavity, to the point where oil had been pushed out into the intercompressor turbine case and overboard, into both the cowling and the exhaust burn-off ducts. The operator has coordinated with the engine manufacturer and has indicated that the engine requires replacement.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. It was noted that the oil level was a little low upon the aircrafts landing in Prince George, BC (CYXS). There was also some oil present in the cowling, suggesting a potential leak at first evaluation. The oil was cleaned up and ground runs were performed, and the oil fluctuations did not reappear. The oil pressure and temperature were steady at all power settings. After shut down, it was noticed that oil was dripping from the cowling collector drain ports, but there was no evidence of further leaks. Oil dripping from the drains is not uncommon, after noting previous oil in the cowling area, as this is the common dump point for all scavenge or ported oil. Oil levels were still maintained at required levels. The aircraft was ground run for another 30 minutes, with no fluctuation in oil pressure. The aircraft was ferried back to Calgary, empty, for further analysis. Analysis result from Calgary, after multiple runs and tests, is currently pointing towards the internal #3 or #4 bearing labyrinth seal leaking air, and thus pressurizing the bearing cavity to the point of pushing oil out into the inter-compressor turbine case and overboard, into both the cowling and the exhaust burn-off duct. This is an internal fault of the engine that, although is not typical, is something that has been present in many turbo-prop engines in the past. Pratt & Whitney have been notified of all the tests and runs, and agree that the inner bearing seal has most likely failed and will require the replacement of the engine.

January 27, 2021


At Victoria Harbour, BC (Water) (CYWH), the flight service station (FSS) heard a broadcast on 121.5 MHz simply stating "Mayday, Mayday, Mayday, Im going down into the water". Unable to establish contact over 121.5 MHz with the aircraft. The Victoria, BC (CYYJ) tower was contacted, and the tower also inquired on 121.5 MHz about the "Mayday" call. The information was forwarded to the Joint Rescue Coordination Centre (JRCC) Victoria.
UPDATE: AOR 271047-V2: Aircraft information added. Aircraft was identified as an American, privately registered Cessna 170A from Ketchikan, AK (PAKT) to Port Angeles/William R. Fairchild, WA (KCLM).
UPDATE: TSB Report #A21P0007: N9114A, a Cessna 170A, was on a VFR flight Ketchikan, AK (PAKT) to Port Angeles, WA (KCLM) with one pilot onboard. When 23NM South of Victoria, BC (CYYJ), the pilot declared an emergency and ditched in the Strait of Juan de Fuca. Canadian and American SAR assets searched the area, but the aircraft and pilot have not yet been found. The search was suspended on January 27, 2021.

August 15, 2021

Incident at SIX MILE LAKE (SOUTH) ON (Water) (CSM6)

TSB Report #A21O0076: A privately registered Piper J3C-65 on floats was conducting a local flight in the area of the Six Mile Lake (South), ON (CSM6) water aerodrome. After a local sightseeing flight, the aircraft returned to CMS6 for a landing. After circling the landing area and looking for any obstructions, the aircraft landed on the water, in a channel, in the vicinity of CMS6. At the same time, a canoe carrying 2 persons and their camping gear was also paddling in the channel. After the aircraft touched down on the water, the canoeists became aware that the aircraft was coming straight in their direction. Both canoeists jumped out of the canoe and the canoe overturned just before the aircraft step taxied over the canoe. The 2 canoeists were rescued by local boaters and were not injured. The aircraft was not damaged.

November 16, 2021

Incident at 9NM SAULT STE. MARIE ON (CYAM) (ATM - inaccurate aeronautical information)

At 2254Z, a Bearskin Airlines Swearingen SW4 (BLS373) from Sudbury, ON (CYSB) to Sault Ste. Marie, ON (CYAM) was cleared to descend to 6000ft when ready, and read back the same. At this time, the controller began to experience significant issues with their transmissions on 134.42 MHz, and had multiple flights state that they were only receiving partial transmissions. At 2257Z, the controller coordinated the departure of a Skylink Express Beech 1900C (SLQ727) on a flight from Sault Ste. Marie, ON (CYAM) to Sudbury, ON (CYSB) with the CYAM tower. The controller continued to troubleshoot the radio problem by switching jacks/headsets and checking with flights for the clarity and completeness of their transmissions. During this time, BLS373 descended below 6000ft and levelled off at 4000ft. SQL727 was in the opposite direction, also at 4000ft, but passed without conflict.

November 6, 2021

Incident at AMILU intersection

A Toronto Airways Cessna 550 (TOR801) from Toronto/Buttonville, ON (CYKZ) to Windsor, ON (CYQG) was given a telephonic clearance by London (YXU) Flight Information Centre (FIC), via coordination with the Area Control Centre (ACC), to climb to 3000 feet upon departure from CYKZ and squawk code 0506, which was read back. On initial contact, TOR801 advised they were climbing to 4000 feet, but had already climbed through 5000 feet. The controller advised TOR801 to descend to 3000 feet and asked what altitude they were climbing to. TOR801 advised they were climbing to 5000 feet. TOR801 was also on the wrong 3A code of 4734. No conflicts or operational impact.

November 1, 2021

Incident at MOOSONEE ON (CYMO) (Bird presence)

A Thunder Airlines Limited Beech A100 (C-GASI/THU102) from Moosonee, ON (CYMO) to Attawapiskat, ON (CYAT) aborted its takeoff from Runway 24 due to high bird activity. A vehicle (ST23) conducted a runway inspection and did not find any carcasses. THU102 also did not report damage to the aircraft. THU102 took off at 1409Z. No impact to operations.

November 10, 2021

Incident at KERPU intersection (Aerodrome, runway or taxiway shutdown)

A Chartright Air Inc. Cessna 560 Citation Ultra (HRT373) from Sarasota/Bradenton, FL (KSRQ) to Toronto/Lester B. Pearson, ON (CYYZ) conducted an overshoot Runway 05 due to a gear indication. They preformed a fly-by of the tower for a visual check, but air traffic control (ATC) could not see well enough due to the darkness. The aircraft requested emergency equipment, and landed Runway 06R at 0130Z. They also requested a tow back to the north end due to a brake problem. The aircraft was disabled on Runway 06R, and the Greater Toronto Airports Authority (GTAA) issued a NOTAM closing the runway. No operational impact.

September 26, 2021

Incident at DRYDEN REGIONAL ON (CYHD) (ATM - weather observation systems)

A Hydro One Networks Inc. Aerospatiale AS350 B3 (C-GHOY) departed from Dryden, ON (CYHD) in 1/4 mile visibility (VIS), reportedly. The pilot had submitted a pilot weather report (PIREP) indicating that VIS and ceiling were unlimited. The Sioux Lookout flight service specialist (FSS) checked the cameras, and they showed the same thing, but only two were operational, so the specialist was unable to override the Automated Weather Observation System (AWOS) for authorization. Also, only 5 minutes after, a second aircraft, a North Star Air Ltd. Pilatus PC-12/45 (C-GKAY/BF707) from Thunder Bay, ON (CYQT) to Dryden, ON (CYHD), achieved a visual on the airport 15 miles back and through 070, which confirms C-GHOYs report.

August 5, 2021

Incident at GODERICH ON (CYGD)

Aviation Incident Report #17221: A privately registered Cessna 172E from Kincardine, ON (CYKM) to Goderich, ON (CYGD) was approaching from the north and when they were east of CYGD, a second privately registered Cessna 172E on a flight to Goderich, ON (CYGD) reported 10NM north. Shortly after the first Cessna 172E reported downwind for Runway 32, the second Cessna 172E indicated they were also downwind Runway 32. The first Cessna 172Es Zaon Collision Avoidance Display showed an aircraft ahead of them, but they thought the second Cessna 172E was behind them. The second Cessna 172E radioed that they were taking a downwind approach over the lake, which caused further confusion as both aircraft had called base Runway 32 within minutes of each other. At the time of the occurrence, there was no universal communications (UNICOM) service. Winds were light and conditions were clear, but with reduced visibility due to smoke and haze.

October 7, 2021

Incident at LONDON ON (CYXU)

At London, ON (CYXU), an ITPS (Canada) Ltd. Beech B60 (C-FYWQ/SA26), inbound for the overhead break for Runway 15, reported "5 initial at 2500ft", but started descending to 2000ft on initial approach. The pilot was subsequently questioned and seemed unaware of the overhead break procedure. As a result, the pilot was given further instruction to start the right break over the threshold, which they also failed to comply with. A Diamond Flight Centre London Inc. Diamond DA 20-C1 (C-GDFP) was departing from Runway 15 as SA26 was approaching from behind.

October 28, 2021


A Provincial Airlines de Havilland DHC-8-315 (C-FPAE/PVL3062) from Sudbury, ON (CYSB) to Montreal/Pierre-Elliott-Trudeau, QC (CYUL) declared “PAN PAN” due to erroneous readings and requested priority for CYUL. Services were also requested at the edge of the runway. The aircraft landed without incident on Runway 06R at 1925Z. No impact on operations.

October 27, 2021

Incident at MUSKOKA ON (CYQA)

An American, privately registered Cessna 180E on a flight to Muskoka, ON (CYQA) made its first call to air traffic control (ATC) after landing on Runway 36. The pilot advised they were broadcasting on the wrong frequency. Operational impact: 5 other aircraft were operating within the Timmins flight service station (FSS) area at CYQA, including a privately registered Piper PA-28R-180 that was conducting circuits on Runway 36 at Muskoka, ON (CYQA). A NOTAM was also in place indicating 20 minutes of prior notice required.

October 25, 2021

Incident at TORONTO / LESTER B. PEARSON INTL ON (CYYZ) (Bird presence)

A WestJet Boeing 737-8CT (C-GJWS/WJA665) from Toronto/Lester B. Pearson, ON (CYYZ) to Calgary, AB (CYYC) reported a possible bird strike departing from Runway 06L. No foreign object debris (FOD) found. No operational impact.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. The aircraft operating as WJA665 on October 25, 2021 was verified to be Tail 802, registration C-GJWS, travelling from CYYZ to CYYC. A review of all technical records for Tail 802 between October 24th to 27th, 2021 was carried out. The result of this review: no record of a bird strike was identified by the flight crew for Tail 802, registration C-GJWS. A review of all 737 series aircraft was also carried out for the same timeline of October 24th to 27th, 2021 for CYYZ, and no reports of a bird strike was found.

October 24, 2021

Incident at LONDON FIC / FIC DE LONDON (ATM - inaccurate aeronautical information)

The St. Catharines/Niagara District, ON (CYSN) remote communications outlet (RCO) frequency 126.7 MHz cannot be muted at positions 7, 10 and 13 (all evening shift positions). Also, the volume is still too high. The Technology Operations Coordinator (TOC) was advised. Operational impact: due to the volume of aircraft broadcasting enroute position reports on this frequency, the high volume level and inability to mute are causing other frequencies to be blocked, resulting in missed calls and numerous requests to repeat transmissions.

September 19, 2021


A privately registered Cessna 172H from Elliott Lake, ON (CYEL) to Ottawa/Carp, ON (CYRP) declared an emergency on 121.5 which was relayed to the centre by several aircraft. The aircraft also squawked 7700 and had apparently lost engine power. Moments later power was regained and the aircraft diverted to Sudbury, ON (CYSB) and landed uneventfully at 2044Z.
DUPLICATE: AOR-277997-V1: The pilot of a privately registered Cessna 172H, at approximately 30NM south of Sudbury, declared an emergency due to engine failure. The pilot was able to restart the engine and landed safely Runway 22 at CYSB at 2046Z. No impact to operations. (Duplicate AOR-277997-V1 / CADORS 2021O1406 deleted after information merge)

September 15, 2021


A Waterloo-Wellington Flying Club Cessna 152 (C-FYKF) from Kitchener/Waterloo, ON (CYKF) to Kitchener/Waterloo, ON (CYKF) was in the circuit and instructed to fly runway heading. The aircraft turned crosswind without authorization. They already had separation with another aircraft in circuit who was also on the runway heading ahead of them. C-FYKF extended their crosswind slightly and then followed. No other impact.

August 10, 2021


At 1NM Northwest (NW) of Toronto/Buttonville, ON (CYKZ), a Canadian Flyers International Inc. Cessna 172N (C-GKWL) on a flight to Toronto/Buttonville, ON (CYKZ) was struck by a remotely piloted aircraft system (RPAS) while on final approach into CYKZ. The RPAS was part of a York Police Services operation in the area of Richmond Hill. No reporting of injuries or extent of the damage to the aircraft. NAV CANADA had not been advised of the RPAS operation.
UPDATE: Aviation Incident Report #17258: The instructor for a Canadian Flyers International Inc. Cessna 172N (C-GKWL) reported that they had just turned from base leg to final for Runway 15 at Toronto/Buttonville, ON (CYKZ) and were established and stable at 1100 ASL, or about 500 AGL, when they felt a jolt that pushed them back on their seat. They thought they had hit a large bird. They proceeded to land. There was no change in configuration or power since they were about to land. When exiting the aircraft, they were shocked to see a major dent on the left underside of the engine cowling. The airbox was also bent. A few hours later, a police detective confirmed a York Regional Police drone had struck their aircraft. The aircraft suffered major damage, including a propeller strike.
UPDATE: TSB Report #A21O0069: During operations in support of police activity approximately 1.5NM NW of Toronto/Buttonville, ON (CYKZ), a DJI Matrice 210 RPAS, operated by the York Regional Police, collided with C-GKWL, a C172 operated by Canadian Flyers International Inc., which was on final approach to Runway 15 at CYKZ with an instructor and student pilot on board. The collision occurred along the approach path for Runway 15. There was minor damage to the propeller of the aircraft and the left hand side of the lower nose cowling was significantly deformed. The aircraft landed without incident. There were no injuries to the pilots or to the persons on the ground. The RPAS was destroyed.

August 3, 2021

Incident at LONDON ON (CYXU) (ATM - weather observation systems)

At London, ON (CYXU), the temperature, dew point and wind sensors failed, necessitating the use of the Vaisala hand-held unit. Technology Operations Coordinator (TOC) advised. This occurrence also took place the day before, but only included issues with the temperature and dew point. Apparently, the current issue stems from a different problem than the prior days issue. The portable Vaisala was reading up to 4 degrees higher than the air temperature from the other London sites: the local uncertified thermometer, and WSN (the local Environment Canada AUTO 8 station). Environment Canada Forecast called CYXU to advise that the surrounding sites were 3 to 4 degrees lower and they needed confirmation because the higher temperature supported a change in forecast and more potential for convective weather. Impact on operations: increase in workload, and risk of an incorrect forecast based on inaccurate backup.

July 12, 2021

Incident at 28NM NORTH BAY ON (CYYB)

A conflict alert activated between a Jetblue Airways Corporation Airbus A321 (N989JT/JBU633) from Boston, MA (KBOS) to San Francisco, CA (KSFO), at FL340, and a phantom target indicating FL355 on a code of 2766. A Delta Air Lines Boeing 767-300 (N175DZ/DAL1308) from New York/John F. Kennedy, NY (KJFK) to Seattle/Tacoma, WA (KSEA), at FL380, was also in very close proximity to JBU633 and the anomalous target at the time. Initial review by the Data Systems Coordinator (DSC) shows that several anomalous targets had appeared in close proximity to these 2 flights between 2025Z and 2043Z. Data has been sent to specialists in Ottawa for review. No impact on operations.

April 10, 2021

Incident at OTTAWA / CARP ON (CYRP)

Aviation Incident Report #17042: A privately registered Quad City Challenger II from Ottawa/Carp, ON (CYRP) to Ottawa/Carp, ON (CYRP) was just over the threshold of Runway 10 when the winds that were gusting suddenly died. Prior to the incident, winds were from the southeast (SE) and the Ottawa/MacDonald-Cartier, ON (CYOW) aerodrome routine meteorological report (METAR) indicated a wind speed of 8 knots (kts). The aircraft dropped, resulting in a hard landing. The left main landing gear sustained structural failure and cracked in half. The aircraft veered to the left, off of the runway, and came to rest in the grass. The left wing came into contact with the runway marker. The engine was shut down and secured. There were no injuries and both occupants exited the aircraft. Upon inspection of the broken gear leg, it was noted that the failure occurred at the site of the bolt hole, located mid-shaft of the gear leg where the cross wires insert.
UPDATE: Aviation Incident Report #17040 and #17041: At approximately 1525Z, a privately registered Quad City Challenger II from Ottawa/Carp, ON (CYRP) to Ottawa/Carp, ON (CYRP) was reported to be disabled on Runway 10. The aircraft appeared to have sustained damage to its undercarriage assembly. The runway sign was also damaged. There were no injuries. The pilot indicated the aircraft was right over the numbers on Runway 10 when it was hit by a gust of wind, causing the aircraft to stall and drop, buckling the left main gear and right main nose gear, and causing it to turn where it came to rest on top of a runway sign on the north side of the runway. The Airport Manager was advised at 1532Z. The aircraft was moved to the hangar at 1700Z.

July 13, 2021


A Korean Airlines Boeing 787-9 (HL8083/KAL8079) from Incheon, South Korea (RKSI) to Toronto/Lester B. Pearson, ON (CYYZ) advised it was in the missed approach for Runway 15L at 1344Z. A second attempt was made for Runway 15L, and this approach was also missed at 1356Z. KAL8079 landed on Runway 24L at 1413Z without further incident (WOFI). No operational impact.

June 7, 2021

Incident at 60NM SUDBURY ON (CYSB)

A Chartright Air Bombardier CL-600-2B16 (HRT085) from Montreal/St-Hubert, QC (CYHU) to Edmonton, AB (CYEG) reported hearing a "Mayday" call on the guard frequency from an Exact Air Cessna R182 (C-GBSC) with an engine failure. This aircraft was not in communication with Toronto (YYZ) air traffic control (ATC) and there was no flight plan on file. The Joint Rescue Coordination Centre (JRCC) Trenton was notified and indicated that Bagotville (YBG) had also heard the call. Numerous attempts by aircraft to contact C-GBSC were unsuccessful. No operational impact. At 2138Z, JRCC advised that C-GBSC had landed safely.

May 25, 2021


A Lake Central Airways Cessna 441 (C-GDTM) from Toronto/Buttonville, ON (CYKZ) to Kitchener/Waterloo, ON (CYKF) was cleared to 8000ft, and the pilot read back the clearance correctly. Subsequently, the aircraft climbed above the cleared altitude, resulting in a loss of separation with a Morningstar Air Express Inc. Cessna 208B (C-FEXF/MAL7056) from Sudbury, ON (CYSB) to Toronto/Lester B. Pearson, ON (CYYZ) at 9000ft. The pilot acknowledged the error. No impact on operations.
UPDATE: TSB Report #A21O0036: C-GDTM, a Cessna 441 aircraft operated by Lake Central Airways, was conducting a post maintenance test flight from Toronto/Buttonville, ON (CYKZ) to Kitchener/Waterloo, ON (CYKF) with two flight crew members onboard. After receiving the clearance to climb to 8000ft from ATC, the flight crew started climbing from 6000ft to 8000ft. Once the altitude was reached, the pilot-in-command disengaged the autopilot and shut down the first engine in order to start the test procedure. The pilot monitoring was reading the checklist and both the pilot-in-command and the pilot monitoring noticed an altitude of approximately 8450ft and started to correct their altitude back to 8000ft. At that same time, ATC also asked C-GDTM to maintain 8000ft, as the altitude deviation resulted in a loss of separation with another aircraft at 9000ft, C-FEXF, a Morningstar Air Express Inc. Cessna 208B, that was conducting flight MAL7056 from Sudbury, ON (CYSB) to Toronto/Lester B. Pearson, ON (CYYZ). Afterwards, C-GDTM requested ATC for a block altitude between 8000ft and 9000ft, which was granted once traffic cleared the area. The crew completed their tests and landed in CYKF without further incident.

March 22, 2021


Aviation Incident Report #17027: At Peterborough, ON (CYQP), a Seneca College of Applied Arts and Technology Cessna 172S (C-GSCB) conducted an overshoot for Runway 27 due to a privately registered Piper PA-28-140 that had crossed the hold short line and was inside the protected landing zone. A second aircraft also conducted an overshoot due to the presence of the Piper PA-28-140.

April 24, 2021


The pilot of a Waterloo-Wellington Flying Club Cessna 152 (C-GGBN) from Kitchener/Waterloo, ON (CYKF) to Kitchener/Waterloo, ON (CYKF) filed their flight plan online with the wrong departure time of "2325Z on April 25th", instead of "2325Z on April 24th". The London Flight Information Centre (FIC) called the Waterloo Wellington Flight Centre (WWFC) to confirm. The London FIC also called the Toronto/Billy Bishop, ON (CYTZ) tower to confirm the flight plan (FP) information, as the CYTZ tower was in contact with the pilot at the time.

March 24, 2021

Incident at KINGSTON ON (CYGK)

A Canadian Aviation Maintenance Cessna 150M (C-GOEE) from Kingston, ON (CYGK) to Kingston, ON (CYGK), in the early downwind for Runway 07, reported that a bright white light illuminated the cockpit for 5 to 7 seconds, and that it was possibly a laser strike. Other aircraft in circuit were advised, no additional laser strikes were reported. The area control centre (ACC) was advised. Police unit was also advised. No operational impact.

February 21, 2021


Wake turbulence was encountered by a Jazz de Havilland DHC-8-300 (JZA8602) from Sudbury, ON (CYSB) to Toronto/Lester B. Pearson, ON (CYYZ) that was 5.7 miles in trail (MIT) of an Air Canada Boeing 787-9 (ACA128) from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson, ON (CYYZ). A Jazz de Havilland DHC-8-300 (JZA8282) from Timmins/Victor M. Power, ON (CYTS) to Toronto/Lester B. Pearson, ON (CYYZ) also experienced wake turbulence while 9 miles in trail (MIT) of ACA128. No impact to operations.

January 24, 2021


The Toronto area control centre (ACC) was advised by both the National Operations Centre (NOC), which had been advised by the Aviation Operations Centre (AVOPS), and by the Joint Rescue Coordination Centre (JRCC) Trenton of an aircraft accident at Lake Eugenia, ON, involving a privately registered, amateur-built Vans RV 7A. There are no injuries and the damage is unknown. No NAV CANADA involvement.
UPDATE: TSB Report #A21O0002: An privately registered, amateur-built Vans RV-7A was conducting a local private sightseeing flight from Kitchener/Waterloo, ON(CYKF) with only the pilot onboard. While cruising northbound in the direction of Collingwood, ON, the engine lost power. The pilot made a 180 degree turn for a precautionary landing on Eugenia Lake, which was frozen and snow covered. During the landing, the nose landing gear collapsed, however, the aircraft did not flip over. The propeller and wheel fairings were also damaged. The pilot exited the aircraft without injury. Police services attended the site.

January 9, 2021

Incident at MUSKOKA ON (CYQA)

An Island Air Flight School & Charters Inc. Cessna 172S (C-FIBT) from Muskoka, ON (CYQA) to Muskoka, ON (CYQA) declared an emergency shortly after its departure from Runway 36 due to smoke in the cockpit. C-FIBT landed and taxied off the runway safely. The fire department was called. A second aircraft in the zone was requested to remain clear of the area until C-FIBT was on the ground. No further impact to operations. (Reference CADORS 2021O0020 / AOR 270529-V1)
UPDATE: TSB Report #A21O0001: C-FIBT, an Island Air Flight School & Charters Inc. Cessna 172S, was on a solo cross-country flight from Toronto/Billy Bishop, ON (CYTZ) to Muskoka, ON (CYQA) with a student pilot on board. Upon arrival, the student pilot noticed an odor from an unknown source, and, after landing, contacted the operator on the telephone. A discussion about the possible sources of the odor ensued, and the student performed several systems checks, but could not replicate the problem. The aircraft departed for a return flight to CYTZ. Upon departure, the odor returned and it was reported that smoke was also visibile; the aircraft returned for landing, and declared an emergency. ARFF services were called and the aircraft landed without further incident.

August 29, 2021

Incident at Tokyo/Narita, Japan (RJAA)

TSB Report #A21F0133: C-GUAJ, a Cargo jet Airways 767-300, was conducting flight CJT1328 between Tokyo, Japan (RJAA) and Vancouver, BC (CYVR). After take-off, the Engine-indicating and crew-alerting system (EICAS) message "R TAIL HYD VAL" appeared in amber. The RJAA tower reported smoke from the tail section on rotation before switching the flight crew to the departure frequency. After flaps retraction, the flight crew requested to level-off at 10000 feet (cleared altitude was 23000 feet), then reached QRH which reads "R TAIL FLT CONTROL SHUTOFF SWITCH MUST BE ON FOR FLIGHT". The flight control shutoff valves on the P61 panel indicated the "R TAIL SHUTOFF VALVE" to be "ON" in white, as well as "OFF" in amber. The switch was guarded and said "GND USE ONLY". The flight crew then contacted maintenance control via Satellite (Sat) phone. Maintenances suggestion was to do nothing with the shutoff valve. Other systems which could have been affected if a tail strike had occurred, such as hydraulics and cabin pressure, looked normal. The flight crew also concluded, after discussion with maintenance, that the lack of the TAIL STRIKE EICAS message made it safe to conduct the flight to its destination . Before landing in CYVR and after extending the gears, the EICAS message "TAILSKID" appeared in amber. QRH actions were performed and an uneventful landing was completed. Post-flight inspection by the maintenance crew revealed the orange paint on the tail skid was partially removed, but the indication on the strut showed no sign of compression. The aircraft was returned to service with tail skid repair deferred on the Minimum Equipment List (MEL).

July 16, 2021


A Cargojet Airways Boeing 767-338 (C-GAZF/CJT2384) from Vancouver, BC (CYVR) to Hamilton, ON (CYHM) declared "PAN PAN" due to an unspecified issue. The aircraft was given priority handling back to CYVR. One aircraft was given a 360 turn for spacing. The aircraft landed safely 1623Z.
UPDATE: TSB Report #A21P0066: C-GAZF, a Cargojet Airways Ltd. Boeing 767-338, was operating as CJT584 from Vancouver, BC (CYVR) to Hamilton, ON (CYHM) with 2 crew members on board. On the climb out, around 10,000 feet ASL, an engine-indicating and crew-alerting system (EICAS) caution alert "Autopilot" advisory occurred. The crew requested to level-off and consulted the appropriate Quick Reference Handbook (QRH) checklist. After approximately 45 seconds, the light extinguished and the crew resumed the climb. As they approached 16,000 feet ASL, the "Autopilot" advisory reappeared. The autopilot was observed straying from the flight director commands, with airspeed decreasing. The crew disconnected the right-hand (RH) autopilot and the aircraft abruptly pitched up due to being significantly out of trim. The crew requested to level off and initiated a turn back to CYVR while declaring a "PAN PAN". During the descent, a "Stab Trim" advisory EICAS message appeared. The aircraft landed without further incident. Emergency vehicles met the aircraft but were quickly stood down. There were no injuries. The aircraft was refueled and the RH autopilot was deferred. The left-hand (LH) and center autopilot had been deferred on previous flights. The aircraft was dispatched and flown manually to CYHM at 27,000 feet ASL. During the flight, the "Stab Trim" advisory EICAS message appeared twice. Maintenance staff replaced the LH and RH stabilizer trim limit switches and tested the autopilot system to clear the defects. The LH stabilizer actuator motor was also replaced to address the recurring stabilizer trim issue. The aircraft was returned to service.

October 21, 2021

Incident at LA RONGE SK (Water) (CJZ9)

At 0020Z, a Transwest Air Ltd. de Havilland DHC-6 (C-FVOG) on a flight to La Ronge (Water), SK (CJZ9) reported final for CJZ9, but failed to report down. Transwest water base was called, but no answer. Dispatch was called and informed that they would have the pilot call to confirm. The Royal Canadian Mounted Police (RCMP) was also advised. At 0040Z RCMP advised C-FVOG was down. The Area Control Centre (ACC) shift manager was advised.