July 15, 2022

Incident at 50NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

A Republic Airways Embraer ERJ 170-200 LR (N108HQ/RPA4524) from Minneapolis/St. Paul, MN (KMSP) to New York/LaGuardia, NY (KLGA) reported a strong emergency locator transmitter (ELT) at FL310 over the Midland, ON (YEE) area. The Joint Rescue Coordination Centre (JRCC) Trenton was notified.

June 2, 2022

Incident at TAGUM intersection

A Jazz Bombardier CL-600-2D24 (C-GJZT/JZA8722) from Minneapolis/St. Paul, MN (KMSP) to Toronto/Lester B. Pearson, ON (CYYZ), descending to a cleared altitude of FL310 after handoff from the Cleveland Air Route Traffic Control Center (ZOB), was observed passing through FL310. The controller queried JZA8722 and the pilot confirmed being cleared to FL310. No impact to operations.

April 7, 2022

Incident at 14NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

An Envoy Air Embraer ERJ 170-100 SE (N762DT/ENY3775) from Chicago/OHare, IL (KORD) to Quebec/Jean Lesage, QC (CYQB) reported hearing a short emergency locator transmitter (ELT) signal burst while cruising at FL310. Joint Rescue Coordination Centre (JRCC) Trenton notified. No further reports.

April 16, 2022

Incident at 4746N / 06414W

An American Airlines Boeing 777-300 (AAL134) from Los Angeles, CA (KLAX) to London/Heathrow, United Kingdom (EGLL) reported moderate/severe turbulence at FL330. Descended to FL310 for a better ride. Flight information centre (FIC) notified. No loss in service.

November 15, 2021

Incident at 5422N / 12024W

A West Fraser Air Learjet 35A (C-GWFG) from Quesnel, BC (CYQZ) to Grande Prairie, AB (CYQU) was cleared to FL310 and climbed to FL316. When queried by air traffic control (ATC), the aircraft descended to FL310.

March 13, 2021

Incident at 7NM NW PRINCETON BC (CYDC)

An Air Canada Boeing 787-8 (C-GHPX/ACA128) from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson (CYYZ) reported a cracked windscreen during its initial check-in at FL310, 20NM northwest of Princeton, and returned to CYVR. No further operational impact.
UPDATE: TSB Report #A21P0020: C-GHPX, an Air Canada Boeing 787-8 aircraft operating as flight ACA128, was conducting a flight from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson, ON (CYYZ), with 10 crew members and 104 passengers onboard. During the initial climb, at approximately 7NM northwest of Princeton, BC (CYDC), the right hand windscreen cracked and triggered a message for the windshield heating system on the Engine Indicating and Crew Alerting System (EICAS). The flight crew completed the emergency checklist, diverted back to CYVR, and declared a "PAN PAN". The aircraft landed without incident and no emergency vehicles were required. There were no injuries and no damage to the aircraft. Maintenance replaced the right hand windscreen and, as a precaution, replaced the window heat controller.

February 17, 2021

Incident at 10NM PRINCETON BC (CYDC)

A CGPUC Holdings Ltd. Socata TBM 700 (C-GPUC) from Vancouver/Boundary Bay, BC (CZBB) to Red Deer, AB (CYQF), at FL310 and near the Princeton (YDC) very high frequency omnidirectional range (VOR), declared an emergency due to a pressurization issue. C-GPUC conducted a descent to 15,000 feet and returned to origin location.
UPDATE: TSB Report #A21P0012: C-GPUC, a Socata TBM 700 (Series A) turboprop aircraft destined for Red Deer, AB (CYQF), was at FL310 near the Princeton, BC (CYDC) VOR when the pilot declared an emergency due to a pressurization issue. The flight descended to 15,000 feet and returned to Boundary Bay, BC (CZBB).
UPDATE from Maintenance and Manufacturing: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. The organizations Person Responsible for Maintenance (PRM) advised that the cause of the event was the failure of the COMM1 antenna to remain attached to the aircraft. In other words, a loss of pressurization occurred due to the Comm 1 antenna departing the aircraft. When the antenna departed the aircraft, it resulted in lost communications and a 3/4" hole in the bottom of the aircraft where the antenna cable was attached to the antenna, which is what led to the loss of pressurization. A subsequent inspection revealed that the antenna was held in place by 6 x 8/32 sealed screws, which are supposed to go into an 8/32 nut plate that is fastened to the doubler inside the fuselage. The inspection after the incident revealed that the aircraft (most likely) left the factory with #10 nut plates on the doubler, which meant that the screws were never truly fastened and the antenna was held on with PRC/sealant. The aircraft maintenance engineer (AME) was consulting with the manufacturer to find a solution. Service Difficulty Report (SDR) no. 20210223023 was submitted. No further action is required.

February 9, 2021

Incident at 50NM SMITHERS BC (CYYD)

A United Parcel Service Co. Boeing 747-800 (N621UP/UPS63) from Anchorage, AK (PANC) to Louisville, KY (KSDF) reported a cabin pressurization issue while en route. The aircraft descended from FL310 to 13,000 feet when approximately 25NM west of Smithers, BC (CYYD). After cruising at A130 for 45 minutes, UPS63 resolved the issue, climbed to FL270 and continued to its destination of KSDF.

November 12, 2021

Incident at 113NM SW TORONTO / LESTER B. PEARSON INTL ON (CYYZ) (ATS operating irregularity)

A Jazz Embraer ERJ 170-200-SU (C-FEKJ/JZA7462) from Chicago/OHare, IL (KORD) to Toronto/Lester B. Pearson, ON (CYYZ) reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) referencing an Air Canada Boeing 737 MAX 8 (C-FSNQ/ACA995) from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Mexico City, Mexico (MMMX). The traffic information was passed by air traffic control (ATC) prior to the TCAS RA. JZA7462 climbed from the assigned altitude of FL310 to FL312. No further issues reported.
UPDATE: TSB Report #A21O0114: C-FEKJ, an Embraer 170-200 aircraft operated by Jazz Aviation LP, was conducting flight JZA7462 from Chicago/OHare Intl, IL (KORD) to Toronto/Lester B. Pearson Intl, ON (CYYZ) with 39 passengers and 4 crew members on board. After receiving a clearance to cross waypoint KNOOK at FL310 from the Cleveland Center, the crew was handed off to the Toronto Center prior to level-off and traffic was pointed out at FL300. The autopilot and auto-throttle were engaged to capture FL310 when the crew received a Traffic Alert and Collision Avoidance System (TCAS) traffic advisory, followed by a resolution advisory (RA) with C-FSNQ, a Boeing 737 Max operated by Air Canada, conducting flight ACA995 from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Benito Juárez/Mexico City Intl, Mexico (MMMX) to climb, which was followed by the crew. Air traffic control (ATC) advised JZA7462 that they had traffic at both FL300 and FL320. The crew advised ATC of the RA and that the flight was recovering to FL310 after the "clear of conflict" message was received. JZA7462 continued to CYYZ and landed without further incident.

September 9, 2021

Incident at 24NM TRENTON ON NDB (YTR) (Flight plan – route)

The Boston Air Route Traffic Control Center (ZBW) advised the controller that the VIPER military operations area (MOA) airspace was "cold" at 1852Z. At 1921Z while a Skywest Airlines Bombardier CL-600-2C10 (SKW3054) from Chicago/OHare, IL (KORD) to Burlington, VT (KBTV) was approaching the boundary the ZBW controller advised that the VIPER was "hot" 30 and below. Although SKW3054 was at FL310 the ZBW controller asked for a modified route as they needed to descend the aircraft. The flight did not penetrate the active MOA and was issued the new route. No operational impact.

June 6, 2021

Incident at TORONTO / DOWNSVIEW ON (CYZD)

TSB Report #A21O0041: C-GUSF, a Bombardier BD-700-1A10 (Global 6000) aircraft, was carrying out the engine relight portion of a standard production flight test. The aircraft was at FL310 in a test flight area, when the left engine (Rolls Royce BR700-710A2-20) was shut down as required by the test. Following the shutdown, the flight crew determined that a restart of the engine should not be attempted due to a Full Authority Digital Engine/Electronics Control (FADEC) fault indication. The relevant checklists were actioned, the flight crew declared a "PAN PAN" and advised Air Traffic Control (ATC) that the aircraft was operating on a single engine and returning to Downsview, ON (CYZD). The flight crew followed standard single-engine operations procedures and landed safely at CYZD.

December 21, 2021

Incident at 40NM NW Erie, PA

Aviation Incident Report: A Federal Express Corporation McDonnell Douglas MD-11 (FDX34) from Indianapolis, IN (KIND) to London/Stansted, United Kingdom (EGSS) was illuminated by a green laser while eastbound at FL310, 40NM northwest of Erie, PA. No injuries reported. Toronto Centre notified due to laser originating from Canada.

January 28, 2021

Incident at 6124N / 04418W

The departure clearance for an American, corporately registered Cirrus SF50 (N6758Y) from Narsarsuaq, Greenland (BGBW) to Reykjavik, Iceland (BIKF) was for FL270. The Gander area control centre reported that the aircraft continued climb to FL310 without clearance.

May 20, 2021

Incident at 5847N / 10906W

At 1514Z, a Kalitta Charters II Boeing 747-400 (N401KZ/CKS815) from Anchorage, AK (PANC) to New York/John F. Kennedy, NY (KJFK) was issued a clearance (CLX) via the controller-pilot data link communications (CPDLC) to climb from FL310 to FL330. At 1515Z, the Edmonton area control centre received a level report via CPDLC that CKS815 was level at FL330. CKS815 was under surveillance and it could be seen that the aircraft had just started its climb and was not level. No impact to operations.

May 13, 2021

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

Gander (QX) coordinated the transfer of control for an AirBridgeCargo Airlines Boeing 747-8 (ABW404) from Chicago/OHare, IL (KORD) to Moscow/Sheremetyevo, Russia (UUEE) at FL310. The previous sector had instructed ABW404 to climb to FL330 without coordination with the Edmonton area control centre (EG ACC).

March 18, 2020

Incident at 12NM MANIWAKI QC (YMW) NDB

A WestJet Boeing 737-7CT (C-FWSF/WJA214) from Calgary, AB (CYYC) to Montreal/Pierre Elliott Trudeau, QC (CYUL) was cleared to FL310 with a correct read back. WJA214 was informed of traffic at FL300. WJA214 reported having the traffic in sight. At FL314, with a descent rate of around 2900/minute, WJA214 advised air traffic control (ATC) of a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) and climbed a few hundred feet. The other aircraft in the vicinity was a Japan Airlines Boeing 787-9 (JA865J/JAL7) from Boston, MA (KBOS) to Tokyo/Narita Intl, Japan (RJAA). After crossing traffic, WJA214 was observed descending below FL310. No impact.

January 23, 2020

Incident at 30NM ST-JEAN QC VOR/DME (YJN) (Communication navigation surveillance/air traffic system)

An American registered Learjet 35A (N244LJ) from Page Field, FL (KFMY) to Quebec/Jean Lesage, QC (CYQB) was cleared to descend to FL320 but read back FL230. This readback error was not corrected by air traffic services (ATS). Impact: separation with a Jazz Bombardier CL-600-2D24 (C-FJZD/JZA8630) from Ottawa/Macdonald-Cartier, ON (CYOW) to Halifax/Stanfield, NS (CYHZ) at FL310 was not maintained. No other impact on operations.

October 15, 2020

Incident at VERTI intersection

A strong and clear emergency locator transmitter (ELT) was heard by a Government Of Canada, Department Of National Defence Airbus A310 (HUSKY84) from Trenton, ON (CYTR) to Trenton, ON (CYTR) at FL310, and a WestJet Boeing 737-6CT (C-GEWJ/WJA248) from Toronto/Lester B. Pearson, ON (CYYZ) to Halifax/Stanfield, NS (CYHZ) at FL410. No impact to operations.

March 5, 2020

Incident at In the vicinity of: AXXIS intersection

A Jazz Bombardier CL-600-2B19 (JZA8936) from Columbus, OH (KCMH) to Toronto/Lester B. Pearson, ON (CYYZ) reported hearing an emergency locator transmitter (ELT) at FL310 near the vicinity of AXXIS. The Joint Rescue Coordination Centre (JRCC) Trenton was notified. No other reports from other aircraft. No impact to operations.

August 5, 2020

Incident at 5010n / 11604w

The pilot of an Air India Ltd. Boeing 737 200 (AIC174) from San Francisco, CA (KSFO) to Delhi/Indira Gandhi, India (VIDP) checked in at FL300 and was given clearance to direct heading to 5900N/11000W and climb to FL310. Shortly after the pilot called saying they were able to climb to FL310. The controller queried and gave instruction to climb to FL310 again. AIC174 was observed still flying same heading and was asked if they were turning to head to 59N/110W, to which the pilot responded negative. AIC174 was advised that they were given clearance to head to 59N/110W and the pilot acknowledged and turned to fly the correct heading. No impact to operations.

February 13, 2020

Incident at 4525N / 06220W

Severe turbulence reported at FL310 by an Aer Lingus Ltd. Airbus A330-300 (EIN104) from New York/John F. Kennedy, NY (KJFK) to Dublin, Ireland (EIDW). Aircraft declared "mayday" and executed an immediate descent to FL290. No injuries or damage. No impact on operations. National Operations Centre (NOC) advised.
Update TSB Report #A20A0008: EI-GAJ an Airbus 330-300 aircraft operated by Aer Lingus was conducting flight EIN104 from John F Kennedy (KJFK) airport, New York, to Dublin airport (EIDW), Ireland. While in cruise at FL310 and approximately 50 NM NE of Halifax, Nova Scotia, the aircraft encountered severe turbulence. The crew declared a MAYDAY and immediately began a descent to FL290. There were no injuries to the crew or passengers nor damage to the aircraft. The aircraft continued to destination.

February 8, 2020

Incident at 5212N / 05247W (Weather - clear air turbulence (CAT)/turbulence)

A Condor Flugdienst GMBH Airbus A330-200 (CFG115) from Cancun, Mexico (MMUN) to Frankfurt, Germany (EDDF) encountered severe turbulence and descended from FL330 to FL310 without clearance.

June 10, 2019

Incident at 15NM ST-JEAN QC VOR/DME (YJN) (ELT)

The loud and clear signal of an emergency locator transmitter (ELT) was heard between Saint-Jean-sur-Richelieu, QC (YJN) and Sherbrooke, QC (YSC), and between FL260 and FL310. Source unknown. Joint Rescue Coordination Centre (JRCC) Trenton was notified.

April 23, 2019

Incident at 5010N / 06200W

A Qatar Airways Boeing 777-300 (QTR726) from Chicago, IL (KORD) to Doha, Qatar (OTHH) reported moderate to severe turbulence at FL310. Requested climb to FL320. Halifax (HZ) flight information centre (FIC) advised. No impact on the operation.

April 5, 2019

Incident at 4710N / 07615W

The pilot of a Nolinor Aviation Boeing 737-2B6C (C-GNLN/NRL943) from Val-dOr, QC (CYVO) to Montreal/Mirabel, QC (CYMX) received and read back clearance for FL310. It then deviated from its altitude up to FL317. After it had been questioned by air traffic services (ATS), NRL943 descended to FL310. No impact on operations.

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.

December 24, 2019

Incident at 22NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

A Pacific Coast Jet Cessna 750 (PXT750) on a flight from Eagle County Regional, CO (KEGE) to Rochester Intl, NY (KROC) reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) to climb while in descent to FL310. Traffic, a Federal Express Corporation Boeing 757-200 (FDX3052) on a flight from Newark Intl, NJ (KEWR) to Seattle/Tacoma Intl, WA (KSEA) was level at FL300.

October 12, 2019

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

An Air Canada Airbus A321-211 (C-GITU/ACA136) enroute from Calgary Intl, AB (CYYC) to Toronto/Lester B. Pearson Intl, ON (CYYZ) was instructed by Cleveland air route traffic control centre (ARTCC) to descend to FL310 at BBOXX and contact Toronto. ACA136 contacted Toronto 30NM West of BBOXX at FL330 and did not initiate a descent. No operational impact. ACA136 reported altitude deviation through their reporting system.

September 23, 2019

Incident at 152NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

An Air Canada Rouge Airbus A320-214 (C-GFCI/ROU1791) from Quebec/Jean Lesage, QC (CYQB) to Toronto/Lester B. Pearson, ON (CYYZ) reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) descending to cleared altitude FL310. A Jazz Bombardier CL-600-2D24 (SERIES 900) (C-FRJA/JZA8035) from Ottawa/Macdonald-Cartier, ON (CYOW) to Toronto/Lester B. Pearson, ON (CYYZ) at FL300 in the vicinity. Traffic had been passed. No impact to operations.

July 11, 2019

Incident at KILLALOE ON VOR/DME (YXI) (ATS operating irregularity)

A Jazz Bombardier CL-600-2B19 (Series 200) (JZA8660) from London, ON (CYXU) to Ottawa/Macdonald-Cartier, ON (CYOW) was instructed by air traffic control (ATC) to descend from FL310 to FL240. Aircraft came within close proximity of another aircraft, an Air Canada Embraer ERJ 190-100 IGW (ACA458) from Toronto/Pearson, ON (CYYZ) to Ottawa/Macdonald-Cartier, ON (CYOW), that was holding at FL270. Instruction was meant for a Jazz Bombardier CL-600-2D24 (Series 900) (JZA8016) from Saskatoon/Diefenbaker, SK (CYXE) to Ottawa/Macdonald-Cartier, ON (CYOW).

June 24, 2019

Incident at 132NM TORONTO ON VOR/DME (YYZ)

An Envoy Air Inc. Embraer EMB-170 (ENY3526) from Chicago/OHare, IL (KORD) to Toronto/Pearson, IL (CYYZ) was given an updated clearance on initial contact to fly the NUBER4 standard terminal arrival (STAR) (the flight had originally filed the NAKBO4 STAR). Approximately 20NM later, ENY3526 began an unauthorized descent from FL310. Controller noticed the deviation and re-cleared the flight. No operational impact, no loss of separation.

Incident at 130NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

An Envoy Air Inc. Embraer EMB-170 (N249NN/ENY3526), from Chicago/OHare, IL (KORD) to Toronto/Pearson, ON (CYYZ), was re-cleared on initial contact to fly the NUBER4 standard terminal arrival (STAR). The flight had originally filed the NAKBO4 STAR. Approximately 20NM later, the flight began an unauthorized descent from FL310. Controller noticed the deviation and re-cleared the flight. No loss of separation, no operational impact.

June 30, 2019

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

An Air Transat Airbus A310-308 (C-GTSH/TSC462) from Montreal/Trudeau, QC (CYUL) to Toronto/Pearson, ON (CYYZ) was cleared to descend to FL330. Aircraft was observed to descend through FL330. When queried, the pilot stated that they had been cleared to FL310. Audio playback confirmed that the cleared level was FL330 and was read back correctly. Crossing traffic was well clear and TSC462 was cleared to continue descent to FL240. No impact on operations.

June 23, 2019

Incident at 35NM SW LONDON ON (CYXU) (ELT)

An Air Georgian Bombardier CL-600-2B19 (series 100) (C-GKEZ/GGN7312) from Indianapolis, IN (KIND) to Toronto/Pearson, ON (CYYZ) reported receiving a strong emergency locator transmitter (ELT) signal, first heard 35NM Southwest of London, ON (CYXU), between 0009Z and 0013Z, whilst descending from FL310 to FL240. Details passed to the Joint Rescue Coordination Centre (JRCC) Trenton.

June 14, 2019

Incident at 45NM TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

A WestJet Boeing 737 600 (WJA475) from Toronto/Lester B. Pearson, ON (CYYZ) to Winnipeg/James Armstrong Richardson, MB (CYWG) reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) while climbing to FL310. Crossing traffic in vicinity was a Sky Regional Airlines Embraer ERJ 170-200 (SKV7595) from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Chicago/OHare, IL (KORD) at FL320. The traffic was passed. No operational impact.

March 17, 2019

Incident at 30NM N DARID intersection

An Air Canada Rouge Airbus A319 (ROU1694) from Kelowna, BC (CYLW) to Toronto/Pearson, ON (CYYZ) was instructed to cross 30NM North of DARID at FL310 or below. The aircraft was observed crossing the restriction at FL321.

December 6, 2019

Incident at 45NM W Jacksonville FL (KJAX)

TSB Report #A19F0310: C-FYJE, an Air Canada Airbus 319-100 operated by Air Canada Rouge, was conducting flight ROU1735 from Lima/Jorge Chávez Intl. (SPJC), Peru to Toronto/Lester B. Pearson Intl. (CYYZ), ON. During cruise at FL350, 45nm W of Jacksonville Intl. (KJAX) FL, the flight encountered turbulence and the flight crew noted the Left Hand (LH) engine N1 decreased. The flight crew requested a lower altitude in search of smoother air. The flight leveled of at FL310 and the LH engine resumed normal operation for the remainder of the flight. Maintenance inspected the engine and found the LH engine HMU (hydro mechanical unit) faulty. Replacement of the HMU took place and the aircraft was returned to service.

December 19, 2019

Incident at 20NM ROCKY MOUNTAIN HOUSE AB (YRM) VOR/DME

The pilot of a Horizon Air Industries Embraer ERJ 170-200 SU (QXE2535) on a flight from Edmonton Intl, AB (CYEG) to Seattle/Tacoma Intl, WA (KSEA) reported a computer error that showed fluctuating air pressure. The aircraft was climbing through FL310 to FL360. The aircraft requested descent to FL300. Once the aircraft levelled at FL300, the pilot reported that the indicators returned to normal. No impact to operations.

November 5, 2019

Incident at 6650N / 10845W

A Summit Air Ltd. BAE Systems (Operations) Limit RJ85 (C-FLRJ/SU8533) from Hope Bay, NU (CHB3) to Yellowknife, NT (CYZF) reported an issue with its flaps and requested a descent to 14 000 feet but subsequently levelled at FL280 instead. No emergency declared. No impact to the operation.
UPDATE from Aircraft Maintenance & Manufacturing: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. After departure from Hope Bay, NU, while climbing through FL310, the flight crew noted that the flap indicator had changed from 0 to 8 degrees down, but there was no change in flight performance to indicate that the flaps had physically moved. To perform the Quick Reference Handbook (QRH) checklist for this possible fault the aircraft descended and slowed to flap extended speed. Moments after completing the checklist the flap indicator moved back to 0. The flight continued to Yellowknife, NT, where on approach the flaps and indicator operated normally and the aircraft landed without further incident. Company maintenance inspected the aircraft and could not find any fault during the testing of the system, the aircraft was returned to service and there have been no further incidents.

October 1, 2019

Incident at 30NM SASKATOON / JOHN G. DIEFENBAKER INTL SK (CYXE) (Aerodrome, runway or taxiway shutdown)

On initial descent to Saskatoon/John G. Diefenbaker Intl, SK (CYXE), a SkyWest Airlines Embraer ERJ 170-200LR (SKW4661) on a flight from Minneapolis/St. Paul Intl, MN (KMSP) to Saskatoon/John G. Diefenbaker Intl, SK (CYXE) advised they needed to figure out an issue and requested a hold. The pilot subsequently requested a diversion to Minot Intl, ND (KMOT) as they were unable to land in CYXE due to Runway 09/27 being closed. Clearance was issued and read back by pilot to KMOT at FL310. SKW4661 was then observed on radar to descend to FL300. No impact to operations.

June 2, 2019

Incident at 100NM WINNIPEG / JAMES ARMSTRONG RICHARDSON INTL MB (CYWG)

A First Air Boeing 737-406 (C-FFNE/FAB702) from Winnipeg, MB (CYWG) to Rankin Inlet, NU (CYRT), declared MAYDAY due to loss of cabin pressure and initiated an emergency descent. FAB702 returned to CYWG and landed safely without further incident. No other impact to operations.
Update TSB #A19C0057: C-FFNE, a Boeing 737-400 aircraft operated by Bradley Air Services (dba First Air), was conducting flight FAB702 from Winnipeg/James Armstrong Richardson Intl (CYWG), MB to Rankin Inlet (CYRT), NU with 4 crew members and 50 passengers on board. During the climb after the departure from CYWG, the flight crew noticed that the number 1 bleed air valve would not activate, and that the associated circuit breaker had popped. The circuit breaker was reset, however it popped again. Following consultation with the operator’s maintenance, the flight crew decided to return to CYWG. During the return, the flight crew noticed that the cabin altitude had increased to 11 000 feet. The QRH was executed, and an emergency descent was initiated from FL310. A MAYDAY was declared, and an overweight landing was completed without further incident at CYWG.

August 17, 2019

Incident at In the vicinity of: MONCTON CENTRE / ACC DE MONCTON

A Qatar Airways aircraft (QTR708) reported moderate to severe turbulence at FL310. The aircraft climbed to FL320 and reported that it was a good ride. The Halifax (YHZ) Flight Information Centre (FIC) was advised. There was no impact on operations, safety was not jeopardized, and there were no injuries.

June 24, 2019

Incident at 80NM YARMOUTH NS VOR/DME (YQI)

A Kuwait Airways Boeing 777-300 (KAC118) reported severe turbulence at FL310 and climbed to FL330. Reported to Flight Information Centre (FIC).

December 29, 2019

Incident at NEEKO Intersection

A Qatar Airways Boeing 777-300 Series (A7BEM/QTR744) from Boston, MA (KBOS) to Doha, Qatar (OTHH) at the oceanic entry point, NEEKO, climbed from FL310 to FL330 without a clearance.

May 30, 2019

Incident at 4256N / 06443W

A Delta Air Lines Boeing 777-233LR (N860DA/DAL84) from Atlanta, GA (KATL) to Paris, France (LFPG) reported continuous moderate to severe turbulence. The aircraft descended from FL310 to FL290.

April 4, 2019

Incident at 5232N / 06307W

A United Airlines Boeing 777-300 (UAL179D) from Newark, NJ (KEWR) to Hong Kong Intl, Hong Kong (VHHH) reported severe turbulence at FL330. The aircraft was given descent clearance to FL310. No impact on operations.

November 28, 2018

Incident at 4530N / 07537W

A Lufthansa Boeing 747-400 (DABVM/DLH471) from Toronto/Lester B. Pearson Intl, ON (CYYZ) to Frankfurt, Germany (EDDF) requested to return to CYYZ due to a technical issue, and requested to dump fuel. The aircraft dumped fuel starting at 0014Z, at FL310 on a heading of 265 degrees. The aircraft requested to descend during fuel dump. Fuel dump was completed at 0033Z at FL230. No emergency was declared. DLH471 landed at CYYZ at 0052Z without further incident.

August 9, 2018

Incident at 23NM SHERBROOKE QC VOR/DME (YSC)

At 1953Z, a Dassault Falcon 2000EX (C-GOHB) operated by Aviation Starlink, Toronto/Lester B. Pearson Intl (CYYZ), ON, to Abu Dhabi (OMAA), United Arab Emirates, reported, at FL322, that it had received a traffic alert and collision-avoidance system (TCAS RA) resolution advisory due to a Boeing 777 Series 300 operated by Etihad Airways P.J.S.C. (ETD140), from Port Hawkesbury (CYPD), NS, to Montréal/Pierre-Elliott-Trudeau Intl (CYUL), QC, which was at FL310. No impact on operations.

June 6, 2018

Incident at 65NM BAGOTVILLE QC (CYBG)

After having been cleared to climb to FL400, a Government of Canada Department of National Defence McDonnell Douglas CF 18 Hornet (ALUT56) from Bagotville, QC (CYBG) to Bagotville, QC (CYBG) rejected its climb to FL380 and started descending to FL310 with neither clearance nor advisory. Impact on operations: a Delta Airlines Airbus A330-200 (DAL137) from Amsterdam/Schiphol, Netherlands (EHAM) to Detroit/Wayne County, MI (KDTW) had to turn 40 degrees to the right to maintain the necessary separation.

February 25, 2018

Incident at 4813N / 06909W

An Etihad Airways Boeing 777-300 (ETD76T) on a flight from Chicago/O'Hare Int'l, IL (KORD) to Abu Dhabi, UAE (OMAA) reported severe turbulence at FL310. The aircraft requested and was cleared to FL290.

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