March 26, 2021

Incident at 5203N / 08933W

A Wasaya Airways Pilatus PC-12/45 (C-GZGZ/WSG511) from Kingfisher Lake, ON (CNM5) to Thunder Bay, ON (CYQT) was cleared to, and read back, FL240, but was observed by the area control centre (ACC) controller levelling at FL250. WSG511 descended immediately to FL240. No impact on operations.

April 3, 2021

Incident at 5851N / 12000W

A United States Air Force Air Mobility Command Lockheed C-5 (Galaxy) (RCH598) from Lincoln, NB (KLNK) to Eielson Air Force Base, AK (PAEI) reported a cabin pressurization issue and descended to FL250. No emergency declared. No impact to operations.

February 18, 2021

Incident at 43NM IQALUIT NU (CYFB)

Despite having been cleared for, and correctly re-reading, FL240, a Keewatin Air Pilatus PC-12 (KEW400), on a MEDEVAC flight from Iqaluit, NU (CYFB) to Igloolik, NU (CYGT), was observed climbing to FL250 before the intervention of the air traffic controller (ATC). The deviation had no impact.

July 16, 2020

Incident at 10NM PARENT QC (CYPP)

The pilot of an Air Inuit Ltd. de Havilland DHC-8-314 (C-GIAB/AIE802) from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Kuujjuarapik, QC (CYGW), level at FL250, requested a descent to 14 000 feet due to depressurization. AIE802 subsequently requested a return to CYUL. No emergency declared or impact on operations. AIE802 touched down on Runway 24L at 1445Z.
Update TSB Report #A20Q0076: C-GIAB, a De Havilland DHC-8-314 operated by Air Inuit, was performing flight AIE802 under instrument flight rules, from Montreal/Pierre Elliott Trudeau Intl airport, QC (CYUL) to Kuujjuarapik Airport, QC (CYGW) with 3 crew members and 9 passengers on board. While cruising at flight level 250, approximately 10 nautical miles (nm) northeast of CYPP, the "Cabin Press" warning light activated. The crew noticed that the cabin altitude was above 10,000 feet and an emergency descent was initiated. An emergency was then declared and the crew performed the Emergency Checklist (QRH). After leveling off at 14,000 feet, the cabin altitude stabilized at 7,000 feet. The crew requested a return to CYUL and the emergency was canceled. The aircraft landed safely and there were no injuries.

September 5, 2020

Incident at In the vicinity of: PRINCETON BC (CYDC)

There were a few Emergency Locator Transmitter (ELT) signal reports in the vicinity of Princeton, BC (CYDC) from multiple aircraft in the climb above FL250. The Joint Rescue Coordination Centre (JRCC) Victoria was advised.

March 12, 2020


A Central Mountain Air de Havilland DHC-8-102 (C-GMJJ/GLR708) from Terrace, BC (CYXT) to Prince George, BC (CYXS) descended from FL250 without clearance. No operational impact.

February 16, 2020

Incident at TRENTON ON (CYTR)

A Northern Air Solutions Inc. Cessna 550 (C-FHLG) from Kitchener/Waterloo, ON (CYKF) to Ottawa/MacDonald-Cartier, ON (CYOW) advised of depressurization, and requested descent. Descent issued to 10,000ft. The aircraft elected to continue on to CYOW. No emergency declared and no impact on operations.
Update TSB Report #A20O0019: C-FHLG a Northern Air Solutions Inc. Cessna 550 aircraft, was cruising at FL250 abeam CFB Trenton (CYTR), ON when the flight crew heard a bang and then the cabin 10,000 ALT light illuminated. The flight crew initiated crew and passenger oxygen, contacted ATC and started an emergency descent to 10,000 feet. The flight crew elected to divert to Ottawa/Macdonald-Cartier Intl. (CYOW), ON and landed without further incident.

August 31, 2020

Incident at In the vicinity of: HAVRE, MT

Aviation Incident Report #16767: While in cruise at FL250, an odour was detected, followed by a smoke or a haze emitting from the front of the cabin of a Saskatchewan Public Safety Agency Gulfstream 695A from Boise, ID (KBOI) to La Ronge (Barber Field), SK (CYVC). An emergency descent was requested from air traffic control (ATC) and initiated to 12,000 feet. The procedures checklist for "Smoke in the Cabin" was initiated. The smoke subsided shortly after the start of the descent. Request was made to level at 13,000 feet and the situation was monitored. Approximately 5 minutes later the haze (oily mist) reappeared briefly. A request was made with ATC for a diversion to the nearest airport (Havre, MT). The checklist for "Smoke in the Cabin" was completed, depressurizing the aircraft and shutting off the environmental system. While descending through 9,000 feet and in visual contact with the airport, the pilot initiated cancellation of IFR services with ATC and landed without incident. A maintenance crew conducted a troubleshoot and a suspected defect with the environmental system was recorded. The aircraft safety was deemed to be unaffected with restrictions (non-pressurized and without the environmental system engaged) in place to continue to its home base. Flight was continued without further incident to home base.

February 9, 2020

Incident at In the vicinity of: PASKE

TSB Report #A20F0032: C-FNJZ, a CRJ 900 operated by Jazz Aviation LP was conducting flight AC8670 from Vancouver Intl. (CYVR), BC to San Diego Intl. (KSAN), CA. While on top at FL270 Vicinity of PASKE (Porter, CA), the crew encountered clear air turbulence. Airspeed fluctuated +/-30kts but did not over-speed nor did the Auto Pilot kick off. Turbulence and Ignition buttons were on. The turbulence made reading the instruments on the panel impossible as they were too blurry. The motion was up/down as well as side/side. The seat belt signs were switched on about 2 min prior to the encounter. Flight crew initiated descent to FL 250 where they had moderate to borderline severe turbulence. Continuing descent to FL230 flight encountered a severe turbulence event that lasted approximately 5 minutes. Flight climbed to FL250 where the turbulent event ceased. Maintenance is arranging for an inspection.

December 13, 2020


A Canadian North Inc. Boeing 737-300 (MPE1403) from Fort MacKay/Albian, AB (CAL4) to Edmonton, AB (CYEG), cleared down to FL250, reported a traffic alert and collision avoidance system (TCAS) warning due to traffic that was level at FL240. Traffic was a WestJet Encore Ltd. de Havilland DHC-8-402 (WEN3359) from Calgary, AB (CYYC) to Yellowknife, NT (CYZF). No evasive action was needed or taken. No loss of separation. Traffic was passed to MPE1403.

April 23, 2020

Incident at In the vicinity of: GRAVELBOURG SK (CJM4) (Bird presence, Aerodrome - other)

Aviation Incident Report #16596: Information for Winnipeg Centre: a suggestion was made that a NOTAM be issued for Gravelbourg, SK (CJM4) and Moose Jaw, SK (CYMJ) regarding increased migratory waterfowl (i.e. geese). Flights of approximately 50 geese have been observed on April 23 and 24, flying Northbound near Gravelbourg. Due to thermal activity, these flights are currently much higher than would be expected normally. Flights of these geese have been seen at approximately FL200 to FL250 above sea level (ASL). This would be an unexpected hazard to civil and nearby military aviation. 15 Wing Royal Canadian Air Force (RCAF) should be advised, as they use this area extensively to transit jet trailers to their southern training zone (CYA-310M). This is a semi-circular area around N49°30.16 W106°0.48.

April 22, 2020

Incident at 5218N / 10500W

Emergency Locator Transmitter (ELT) activation reports were received from multiple aircraft that were between FL250 and FL410, Eastbound, beginning approximately 35NM East of Saskatoon/John G. Diefenbaker, SK (CYXE): a Government of Canada, Department of National Defence Airbus A310 (CFC4168) from Edmonton, AB (CYEG) to Trenton, ON (CYTR); a Sunwest Aviation Ltd. Learjet 45 (C-GVVZ) from Edmonton, AB (CYEG) to Winnipeg/James Armstrong Richardson, MB (CYWG); and a Jazz Bombardier CL-600-2D24 (JZA8628) from Saskatoon/John G. Diefenbaker, SK (CYXE) to Toronto/Lester B. Pearson, ON (CYYZ). The Joint Rescue Coordination Centre (JRCC) Trenton was notified. No operational impact.

February 25, 2020

Incident at ADSAM intersection (Communication navigation surveillance/air traffic system)

A Government Of Canada, Department Of National Defence Lockheed C-130 (Hercules) (CFC2531) from Eureka, NU (CYEU) to Iqaluit, NU (CYFB) reported position ADSAM at FL250 on an IFR clearance to CYFB. No estimate had been received from Reykjavik Area Control Centre (BIRD). BIRD advised. No impact to the operation.

February 15, 2020

Incident at 5830N / 08100W

At approximately 1820Z, a United States Armed Forces Military Airlift Command Lockheed C-5 (Galaxy) (RCH708) from Rota, Spain (LERT) to Fairfield/Travis Air Force Base, CA (KSUU) stated they had a pressurization problem and requested descent to FL250. While on descent, the crew indicated they would like to climb back up to FL340. No impact on operations.

February 3, 2020


TSB Report #A20A0007: C-GBJZ, a de Havilland Dash 8-400 aircraft operated by Jazz Aviation LP, was conducting flight JZA8902 from Montreal Trudeau airport (CYUL), QC, to the Greater Moncton Romeo Leblanc airport (CYQM), NB. While in cruise at FL250 over Fredericton New Brunswick, the aircraft encountered severe turbulence. The autopilot disengaged, the aircraft banked left to about 40 degrees and lost approximately 1000 feet before the crew could regain control. The turbulence lasted for approximately 45 seconds before abating. The 77 passengers and 4 crew were wearing seatbelts and no one was injured. The aircraft landed safely at CYQM. Maintenance completed a severe turbulence inspection and the aircraft was released to service.

July 23, 2019

Incident at 175NM SW KUUJJUAQ QC (CYVP)

After depressurization had occurred, a Chrono Aviation Beech 1900D (C-FKNO/NDL901) from Roberval, QC (CYRJ) to Kuujjuaq, QC (CYVP) had to descend from FL250 to 10 000 ft. No emergency declared. At 10 000 ft, NDL901 confirmed that everything was fine. No impact.

June 21, 2019

Incident at 30NM ROBERVAL QC NDB (RJ)

A target was seen at FL250 descending to FL236 and travelling north-east at a speed of 110 kt in Class A airspace. No impact.

November 21, 2019

Incident at 50NM KAMLOOPS BC (CYKA)

A privately registered Cessna 170A from Kamloops, BC (CYKA) to Prince George, BC (CYXS) was cleared to FL240 however, the aircraft climbed to FL250 initially before being instructed to return to FL240. No operational impact.

September 17, 2019


TSB Report #A19P0140: C-GEOQ, a Boeing 767-375 operated by Air Canada Rouge, was conducting flight ROU1566 from Vancouver Intl (CYVR), BC to Montréal/Pierre Elliott Trudeau Intl (CYUL), QC with 8 crew members and 245 passengers on board. On the initial climb at approximately 7000 feet ASL, the flight and cabin crew noticed a strong odour throughout the aircraft. The flight crew attempted to clear the odour however with no success. The flight crew requested to level off at FL250 to troubleshoot the issue. Subsequently, the crew declared a PAN PAN, donned their oxygen masks and returned to land in CYVR without further incident. It was discovered that the cause of the strong odour was a shipment of Durian fruit in the forward cargo compartment. The fruit shipment was removed and the aircraft was returned to service.

July 27, 2019

Incident at 40NM Kelowna (CYLW)

An Image Air Charter Ltd Cessna 525C (C-GNTL) from Kelowna, BC (CYLW) to Calgary, AB (CYYC) departed CYLW, and was cleared to and readback FL250. Climbing through FL250, C-GNTL asked for confirmation of FL280 cleared altitude. C-GNTL was re-cleared to FL310. No operational impact.

July 8, 2019

Incident at 4911N / 12100W (ELT)

At 1736Z, a WestJet Encore Ltd. de Havilland DHC-8-402 (WEN3306) from Abbotsford, BC (CYXX) to Calgary, AB (CYYC), on a track and at FL250, reported an emergency locator transmitter (ELT) signal. The signal was lost at 1741Z. The Joint Rescue Coordination Centre (JRCC) Victoria was informed at 1750Z.

June 21, 2019

Incident at BOOTH intersection

A WestJet Boeing 737-700 (WJA171) from Edmonton, AB (CYEG) to Vancouver, BC (CYVR) responded to a traffic alert and collision avoidance system (TCAS) resolution advisory while in descent thought FL260. The aircraft had been cleared to FL250. The traffic, a Jazz de Havilland DHC-8-402 (JZA8489) from Calgary, AB (CYYC) to Vancouver, BC (CYVR) was at FL240. No operational impact.

April 24, 2019

Incident at 5143N / 11757W (ELT)

A WestJet Encore de Havilland DHC-8-402 (WEN3224) from Kelowna, BC (CYLW) to Edmonton, AB (CYEG) at level at FL250, 45N of Revelstoke, BC (CYRV), reported receiving an emergency locator transmitter (ELT) signal which lasted for 2 minutes. The Joint Rescue Coordination Centre (JRCC) Victoria was advised and informed that other aircraft in the area did not received the signal.

April 3, 2019

Incident at 5032N / 11528W

A WestJet Boeing 737-700 (WJA116) from Vancouver, BC (CYVR) to Calgary, AB (CYYC), descending into CYYC, collocated with a WestJet Encore Ltd. de Havilland DHC-8-402 (WEN3160) from Kelowna, BC (CYLW) to Calgary, AB (CYYC). WEN3160 was level at FL250, and WJA116 received a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) at 26, 200. WEN3160 had a TCAS warning but no RA. WJA116 did not follow the RA. Traffic was passed to both aircraft prior to the TCAS event. No issues or loss of separation. WJA116 levelled off at FL260.

November 14, 2019

Incident at In the vicinity of: HAMILTON ON (CYHM)

Aviation Incident Report #16417: A SWT Group Inc. Socata TBM 700 (C-GPVB) on a flight from Windsor, ON (CYQG) to Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) was in trim and autopilot engaged in level cruise at FL250 eastbound over Lake Ontario heading towards Montreal. There was a sensation that the aircraft was side-slipping. The pilot noted a PFD MESSAGE “YTRM” and also noted that the YAW TRIM INDICATION was not in the normal approximately centred position and was slewed left. As per checklist autopilot and trims switches were disconnected, and the pilot hand flew the aircraft. The aircraft was easily controlled with manual rudder input and with power/speed adjustments. I pulled the YAW TRIM circuit breaker and re-engaged the electric trim switches as per pilot operating handbook (POH) to be able to use aileron and elevator electric trims and autopilot, the rudder trim disabled. The pilot reviewed the options with the aircraft owner and decided to divert to a nearby airport where the weather was good and effected a normal landing at Hamilton, ON (CYHM) to have maintenance address the occurrence.

October 17, 2019

Incident at 35NM THUNDER BAY ON (CYQT) (ATM - inaccurate aeronautical information)

An Air Bravo Pilatus PC-12/45 (C-FKPI/AB1250) from Thunder Bay, ON (CYQT) to North Spirit Lake, ON (CKQ3) was issued a clearance to FL250. The altitude was changed in Extended Computer Display System (EXCDS) to FL240. No impact to operations. No other aircraft in the vicinity.

August 1, 2019


Aircraft in vicinity of 25 NM southeast of Oshawa, ON (CYOO) at approximately FL250 reported strong emergency locator transmitter (ELT). No further reports after 1345Z.

July 20, 2019

Incident at In the vicinity of: TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

At approximately 1910Z, an Emirates Airbus A380-800 (A6EDO/UAE242) from Toronto/Lester B. Pearson International Airport, ON (CYYZ) to Dubai, United Arab Emirates (OMDB) declared a "PAN PAN" with a #2 engine shut down. UAE242 stopped the climb at FL250 and continued eastbound. At 1952Z, northeast of Sherbrooke, QC (CYSC), UAE242 requested a return to CYYZ and began dumping fuel. There were 481 souls on-board, no hazardous materials (HAZMAT), and 93 tonnes of fuel estimated at arrival at CYYZ. UAE242 requested emergency response services (ERS) to be standing by. The North American Aerospace Defence Command (NORAD), the National Operations Centre (NOC), the Greater Toronto Airports Authority (GTAA), and the CYYZ Tower, Terminal, and East High were all advised. UAE242 landed on Runway 33R at CYYZ at 2057Z, and taxied to the gate without further incident (WOFI). Operational impact included a WestJet Encore Ltd. de Havilland DHC-8-402 (WEN3473) from Ottawa/MacDonald-Cartier International Airport, ON (CYOW) to Toronto/Lester B. Pearson International Airport, ON (CYYZ) conducting a go around for Runway 23 as UAE242 rolled through the intersection.
Update TSB #A19O0095: A6-EDO, an Airbus A380-800 aircraft operated by Emirates Airlines was conducting flight UAE242 from Toronto Pearson International Airport (CYYZ), ON to Dubai International Airport (OMDB), United Arab Emirates. Approximately 20 minutes after departure, UAE242 declared a PAN PAN with the #2 engine shut down. UAE242 requested to return to CYYZ and began dumping fuel. The aircraft landed uneventfully on runway 33R at CYYZ with ARFF standing by.

June 22, 2019

Incident at 20NM W LONDON ON (CYXU) (ELT)

A Jazz Bombardier CL-600-2D24 (Series 900) (C-FTJZ/JZA8911) from New Orleans, LA (KMSY) to Toronto/Pearson, ON (CYYZ) reported hearing an emergency locator transmitter (ELT) signal from 20NM West of London, ON (CYXU) at FL250 until 10NM West of CYXU. The Joint Rescue Coordination Centre (JRCC) Trenton was advised. No operational impact.

June 23, 2019

Incident at 4526N / 07525W (ELT)

A loud and clear emergency locator transmitter (ELT) signal was heard from 4526N/07525W, at FL250, to 4510N/07712W, at FL330. Source unknown. Joint Rescue Coordination Centre (JRCC) Trenton was notified.

June 14, 2019

Incident at In the vicinity of: TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

A Jazz de Havilland DHC-8-402 (JZA8972) from Toronto/Pearson, ON (CYYZ) to Saint John, NB (CYSJ) departed and developed a cracked windshield at FL250. Pilot requested descent to 14000 ft and elected to continue on to destination.

May 16, 2019


At 0012Z, a Porter Airlines de Havilland DHC-8-402 (POE638) from Thunder Bay, ON (CYQT) to Toronto/Billy Bishop, ON (CYTZ) reported an emergency locator transmitter (ELT) 20NM North of Sault Ste. Marie, ON (CYAM) at an altitude of FL250, direction Eastbound. Signal was lost at 0030Z 10NM South of Gore Bay-Manitoulin, ON (CYZE).

April 8, 2019


An Air Canada Embraer ERJ 190-100 IGW (ACA507) from Toronto/Pearson, ON (CYYZ) to Chicago/OHare, IL (KORD) was cleared to, and readback, FL240. Aircraft was observed climbing to FL250.

November 23, 2019

Incident at 340NM WNW Dublin Intl (EIDW)

TSB Report #A19F0296: C-GHQY, a Boeing 787-8 was operated by Air Canada as flight AC0857 from London/Heathrow (EGLL), England to Toronto/Lester B. Pearson Intl. (CYYZ), ON. In cruise, approximately 340nm WNW of Dublin Intl.(EIDW), Ireland, flight crew heard a loud bang and the captain’s window shattered. QRH actions were completed, dispatch was advised and the decision was made to divert to EIDW. A PanPan was declared with Shanwick Oceanic, flight descended to FL250 and slowed to minimize pressure on window. Flight landed without further incident.

April 9, 2019

Incident at Nashville (KBNA)

TSB #A19F0088: C-GKEP, a Bombardier CL-600-2B19 CRJ200 aircraft operated by Air Georgian, was conducting flight GGN7332 from Nashville Intl (KBNA), TN to Toronto/Lester B. Pearson Intl (CYYZ), ON with 3 crew members and 45 passengers on board. During the climb to cruising altitude after the departure from KBNA, the aircraft experienced a left engine 14th stage duct issue. The flight crew stopped the climb at FL250, requested a return to KBNA, and declared a PAN PAN. The aircraft landed back without further incident. The operator’s maintenance replaced the number 1 BLCU. After a few tests, the aircraft was returned to service.

March 5, 2019

Incident at Massena NY (MSS) (ELT)

A Jazz de Havilland DHC-8-402 (C-GJZR/JZA8960) from Toronto/Pearson, ON (CYYZ) to Fredericton, NB (CYFC) at FL250 in the Massena, NY area indicated that it had heard a loud and clear emergency locator transmitter (ELT) signal for over a minute. Joint Rescue Coordination Centre (JRCC) Trenton was notified.

November 21, 2019

Incident at 5435N / 11245W

A WestJet Boeing 737-700 (WJA4013) on a flight from Fort McKay/Firebag, AB (CYFI) to Edmonton Intl, AB (CYEG) was descending in to CYEG. Traffic information was passed on a WestJet Encore de Havilland DHC-8-402 (WEN3132) on a flight from Fort McMurray, AB (CYMM) to Edmonton Intl, AB (CYEG) at FL240. WJA4013 was cleared to FL250. WJA4013 reached FL260 and responded to a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) and climbed 300 feet.

November 7, 2019


A Jazz de Havilland DHC-8-402 (C-GSJZ/JZA8583) from Saskatoon/Diefenbaker, SK (CYXE) to Calgary, AB (CYYC) was cleared to Flight Level 240 and was subsequently observed climbing through Flight Level 245. Pilot was queried and returned to FL240. The preliminary investigation revealed that the pilot read back FL250 and the discrepancy was not detected.

October 15, 2019

Incident at 6950N / 07723W

A target was observed on radar at FL250 squawking 2000. The aircraft was determined to be a Keewatin Air Beech B200 (C-FSKN/KEW203#) on a flight from Arctic Bay, NU (CYAB) to Iqaluit, NU (CYFB). Communication was established with the aircraft and it was determined that no IFR clearance had been issued. An IFR clearance was subsequently issued.

July 29, 2019

Incident at 5537N / 11635W

A Canadian Western Airlines Beech 200 (CWA928-M) from Peace River, AB (CYPE) to Edmonton, AB (CYEG) was cleared to FL250 and was observed climbing through FL256. Aircraft was re-cleared to FL270. No impact to operations.

July 20, 2019


A Jazz de Havilland DHC-8-402 (JZA8514) from Edmonton, AB (CYEG) to Winnipeg/Richardson, MB (CYWG) reported a strong emergency locator transmitter (ELT) signal over the Wainwright, AB (YWV) very high frequency omnidirectional range (VOR) while heading eastbound at FL250. The Joint Rescue Coordination Centre (JRCC) Trenton was advised. No impact to operations.

July 16, 2019


A WestJet Encore de Havilland DHC-8-402 (WEN3296) from Calgary, AB (CYYC) to Regina, SK (CYQR) accepted clearance intended for WEN3396 and commenced climb with traffic 1 000 ft above. Separation between WEN3296 and a Jazz de Havilland DHC-8-402 (JZA8441) from Regina, SK (CYQR) to Calgary, AB (CYYC) deteriorated to 2.6NM where 3NM is required. No other impact to operations.
Update TSB #A19W0089: C-FQWE, a WestJet Encore De Havilland DHC-8-402, was operating as flight WEN3296 from Calgary (CYYC), AB to Regina (CYQR), SK with 5 crew and 68 passengers onboard. On departure, C-FQWE was instructed by terminal controller to climb and maintain 9000 feet ASL. A few moments later WEN3296 inadvertently acknowledged another radio call from ATC meant for WEN3396, a WestJet Encore De Havilland DHC-8-402. WEN3296 started a climb to a new clearance limit of FL250. A loss of separation occurred with an arriving aircraft, C-GKUK, a Jazz Aviation De Havilland 8-402 conducting flight JZA441, that was cleared to 10 000 feet ASL. Separation deteriorated to 2.6 nm laterally where 3 NM is required. Separation was regained when the controller instructed JZA441 to turn right. There were no TCAS RAs from either aircraft.

March 7, 2019

Incident at 5240N / 11310W (ELT)

An emergency locator transmitter (ELT) signal was heard by an aircraft at 0430Z, at FL250, and the signal strength was strong. The ELT signal was reported to the Edmonton Area Control Centre (ACC). No impact on operations.

October 9, 2019

Incident at 5451N / 04812W

A United States Air Force McDonnell Douglas C-17 (RCH108) on a flight from Ramstein Air Base, Germany (ETAR) to Dover Air Force Base, DE (KDOV) at position 5451N4812W declared MAYDAY at FL300 with smoke in the cockpit and descended to FL250 direct to Gander, NL (CYQX). Aircraft landed safely at 1549Z. No traffic. (AOR 256945-V1 deleted).

May 31, 2019

Incident at 105NM WABUSH NL (CYWK)

An Air Inuit de Havilland DHC-8-314 (C-FIAI/AIE820) from Quebec/Jean Lesage, QC (CYQB) to Schefferville, QC (CYKL) reported a pressurization problem at FL250 and asked to descend to 13 000 ft. No impact on operations.

May 13, 2019

Incident at 5801N / 05333W

At position 5801N/05333W, a Norwegian Air Boeing 787-8 (LNLNB/NAX7055) from Copenhagen, Denmark (EKCH) to Orlando, FL (KMCO) lost power in its #1 engine and descended to FL250. The flight requested to divert to Goose Bay, NL (CYYR) and was cleared as requested.
Update TSB #A19A0036: LN-LNB, a Boeing 787-8 aircraft operated by Norwegian Air Shuttle, was conducting flight NAX7055 from Copenhagen/København Kastrup (EKCH), Denmark to Orlando Intl (KMCO), FL with 14 crew members and 227 passengers on board. During cruise flight approximately 265 nm north east of Goose Bay (CYYR), NL, the aircraft experienced an exhaust gas temperature exceedance, followed by a roll back and vibration of the number 1 engine. The flight crew requested a descent and a diversion to CYYR, and completed the QRH memory items and checklist. The aircraft dumped fuel, and landed with the number 1 thrust lever at idle without further incident.

November 22, 2018

Incident at In the vicinity of: MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

An Air Creebec de Havilland DHC-8-102 (C-FCJD/CRQ920) from Val-dOr, QC (CYVO) to Montreal/Pierre Elliott Trudeau, QC (CYUL) reported a pressurization problem at FL250 and requested to descend to FL190, without declaring an emergency. CRQ920 landed without incident at 1649Z. No impact on operations.

October 20, 2018


An Icelandair EHF Boeing 757-200 (TFISJ/ICE688) from Orlando, FL (KMCO) to Keflavík, Iceland (BIKF) declared MAYDAY and requested to land at the nearest aerodrome. Air traffic services (ATS) cleared the aircraft to divert to the Canadian Forces Base in Bagotville, QC (CYBG) and descend. At 0201Z, ICE688 indicated that it had a cracked windshield but that the situation was under control. ICE688 landed on Runway 11 at CYBG at 0215Z. Emergency services were deployed. No other impact on operations.
Update: TSB Report #A18Q0172: TF-ISJ, an Icelandair Boeing 757-200 (ICE688) with 7 crew members and 155 passengers on board, was on an IFR flight from Orlando Intl (Florida) to Keflavik (Iceland). While the aircraft was approximately 50 miles southeast of the Bagotville, Quebec (CYBG) airport, at FL350, the pilot-in-command noticed the presence of arcing in the right-hand corner of the left forward window (LFWD WINDOW). The windshield heat was turned off and shortly afterwards, a loud cracking sound was heard. The flight crew members put on their oxygen masks and declared MAYDAY due to the crack in the front-left windshield and conducted an emergency descent. When it passed FL250 and noticed that the cabin pressure had remained constant, the emergency descent was rejected. The pilot-in-command took the oxygen mask off, but the first officer kept it on as a precaution. A normal descent was followed and the flight crew requested to be diverted to CYBG, where the aircraft landed without any problems.
UPDATE Aviation Incident Report #15745: An Icelandair Boeing 757-200 (TFISJ/ICE688) departed Orlando, FL (KMCO) Runway 36R at 2312Z and the flight was uneventful for almost 3 hours. During cruise and inbound to SAVERY FL350 around 0150Z, when the crew was working on getting an oceanic clearance from Gander, the captain noticed bright sparks coming from lower right corner of the left forward (LFWD) window. The sparks increased very rapidly and spread from right to left. The captain notified the first office (FO) and turned the window heat for that window off. The crew started working on the QRH and heard a loud bang and cracking noise. The crew decided to declare an emergency on the Montreal frequency and asked for a lower altitude. The flight was cleared at lower altitude, and the crew in the cockpit donned the oxygen masks, established crew communication and started the descent. When the crew noticed that the cabin pressure was not rising and was not uncontrollable, the captain decided to abort the emergency descent procedure but did continue the descent with the masks on as a precautionary measure. Captain gave the crew the alert call. Passing FL250 and because the cabin pressure was still normal, the captain took off his/her oxygen mask to get a clearer picture of the situation, but asked the FO to keep their mask on as a precaution. Montreal air traffic control (ATC) was very helpful and gave the crew a direct to Bagotville, QC (CYBG).

July 27, 2018

Incident at 4515N / 07223W (ELT)

A WestJet Encore Bombardier DHC-8-402 (C-FJWE/WEN3482) from Ottawa/Macdonald-Cartier, ON (CYOW) to Halifax/Stanfield, NS (CYHZ) reported hearing a loud and clear emergency locator transmitter (ELT) signal at 4515N 07223W at FL250. No impact on operations.

June 3, 2018

Incident at 5925N / 07356W

In a non-radar environment, an Air Inuit de Havilland DHC-8-314 (C-GIAB/AIE847) from Puvirnituq, QC (CYPX) to Kuujjuaq, QC (CYVP) had been cleared for FL250 and levelled off. Once it was identified on the radar, AIE847 indicated that it was at FL245. No impact on operations.