July 23, 2022

Accident at 4609N / 07539W

Information received from the Joint Rescue Coordination Centre (JRCC) Trenton: During a landing on water, a privately registered, amateur-built Pathfinder lost control and crashed. The extent of the damages was unknown, but the aircraft was half submerged. The only soul on board was slightly injured. The National Operations Centre (NOC), Aviation Operations Centre (AOC) and the Transportation Safety Board of Canada (BST) were notified.

July 4, 2022

Incident at 4526N / 07554W

A privately registered, amateur-built Vans RV 8 from Ottawa/Carp, ON (CYRP) to Ottawa/Gatineau, QC (CYND) lost its radio transmitting capabilities, but was still able to receive. The aircraft continued to CYND, no declared emergency, and landed safely at 1730Z. No operational impact.

May 28, 2022


A Government of Quebec Canadair CL600-2B16 (QUE10) on a MEDEVAC IFR flight from Rouyn-Noranda, QC (CYUY) to Montréal/Pierre-Elliott-Trudeau, QC (CYUL) conducted an overshoot on final for Runway 24L, because they lost visual contact due to a layer of clouds.

May 23, 2022

Incident at 4812N / 07127W

A strong, intermittent emergency locator transmitter (ELT) signal was heard by a WestJet aircraft (WJA361) at 36,000 ft at 4812N 07127W. The signal was lost at 4828N 07206W. Reported to the Joint Rescue Coordination Centre (JRCC) Trenton. No impact on operations.

May 18, 2022


A Richcopter Inc. Cessna 150M (C-GUDB) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND) reported 7NM northeast of CYND, inbound for a full stop, at 1153Z. The aircraft was mistaken and was actually lost, 55NM to the south. C-GUDB then contacted Air Traffic Control (ATC) and was vectored back to CYND and landed safely at 1324Z. No impact on operations.

May 11, 2022

Incident at SEPT-ÎLES QC (CYZV) (Aerodrome, runway or taxiway shutdown)

A privately registered Quad City Challenger II experienced a runway excursion when conducting taxi tests on the ground at Sept-Îles, QC (CYZV). The aircraft lost a wheel and the pilot reported seeing smoke come from the aircraft. No fire was declared. Impact: the runway was closed until 2002Z. Flight and ground delays for several aircraft.

May 7, 2022

Incident at In the vicinity of: QUÉBEC / JEAN LESAGE INTL QC (CYQB)

A Government of Quebec Canadair CL600-2B16 (QUE10) on an IFR MEDEVAC flight from Bonaventure, QC (CYVB) to Québec/Jean-Lesage, QC (CYQB) declared "PAN PAN." The aircraft had a problem with its right engine and lost oil pressure. The Aircraft Rescue and Fire Fighting (ARFF) unit and Airport Safety were notified. The aircraft landed without further incident at 0710Z. No impact. The National Operations Centre (NOC) and Aviation Operations Centre (AVOPS) were advised.

March 30, 2022


Communications were lost with a Pascan Saab 340B (PSC878) from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Îles de la Madeleine, QC (CYGR) after the aircraft was cleared for the approach in CYGR. PSC878 was not in communication with Mont-Joli radio. The air traffic controller (ATC) received an "arrived" message when the aircraft landed. No impact on operations.

April 8, 2022

Incident at MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL) (FOD (foreign object debris), Aerodrome, runway or taxiway shutdown)

A vehicle (Fauconnier1) was inspected which reported finding a large "tow bar" on Taxiway Alpha at the corner of AS. A few minutes later, another vehicle (SER659) reported having lost the tow bar and returned to get it. An Air Canada aircraft (ACA097), which had landed on Runway 06R, had to backtrack since Alpha was unserviceable. Taxiway Alpha was clear at 1008Z.

March 25, 2022


A Jazz de Havilland DHC-8-402 (C-GGOI/JZA7928) from Montréal/Pierre-Elliott-Trudeau, QC (CYUL) to Québec/Jean-Lesage, QC (CYQB) pulled up on the area navigation (RNAV) approach for Runway 06 because it had lost its vertical navigation (VNAV) capability. It initiated an instrument landing system (ILS) approach for Runway 06. No impact on operations.

March 17, 2022

Accident at SEPT-ÎLES QC (CYZV)

A Héli-Boréal Aérospatiale AS 350-B2 (C-GFBW) from Sept-Îles/Héli-Boréal, QC (Heli) (CHB4) crashed on the ice in the Sept-Îles bay after an emergency landing. No impact.
UPDATE from the Joint Rescue Coordination Centre: The Joint Rescue Coordination Centre (JRCC) Halifax indicated that, shortly after departure, the helicopter had problems with its windshield and had to clean it off. The pilot made the decision to land on the ice south of CHB4 instead of returning to CHB4. During the landing, the pilot lost visibility in blowing snow. The helicopter crashed on its side (rolled over). The incident happened around 1150Z and the emergency locator transmitter (ELT) alerted JRCC. There were two individuals aboard the helicopter. Unknown damages.

March 9, 2022


An Orizon Aviation Quebec Inc.Cessna 152 (C-GQVQ) from Quebec/Jean Lesage, QC (CYQB) to Quebec/Jean Lesage, QC (CYQB) lost communications approximately 3NM east of the airport.

January 18, 2022

Incident at QUÉBEC / JEAN LESAGE INTL QC (CYQB) (ATM - inaccurate aeronautical information)

For about 1 minute at Quebec/Jean-Lesage, QC (CYQB), the flight information centres (FICs) National Voice Communication System (NVCS) was unserviceable (U/S). All radio (RDO) frequencies (FRQ), the air traffic control (ATC) lines and telephone lines were not available. Known impact: a call from the pilot briefing service (PBS) that was in progress was lost. The technology operations coordinator (TOC) was notified.

January 7, 2022

Incident at SEPT-ÎLES QC (CYZV) (ATM - NAVAIDS/radar)

Radar feed from Sept-Îles, QC (CYZV) intermittent for about 5 minutes, around 1532Z. Radar power lost at 1818Z. The Technology Operations Coordinator (TOC) and the Area Control Centre (ACC) were advised.

June 27, 2022

Incident at 4905N / 12156W

A Martini Aviation Ltd. Embraer EMB-505 (C-GEMB) from Fort Langley, BC (CBQ2) to Penticton, BC (CYYF) lost the ability to transmit. They used the "identification feature" to continue to communicate with air traffic control (ATC) until landing safely at CYYF. No operational impact.

June 8, 2022


While an Airsprint Inc. Cessna 525B (C-FNAS/APS473) from Vancouver, BC (CYVR) to Penticton, BC (CYYF) was parking on the main apron, the flight service station (FSS) advised the pilot that their right main landing gear door/cover appeared to be broken. The pilot parked and later advised there was in fact an issue with the right main gear and it looked like they might have lost a part or parts along the way. The FSS advised the airport manager (APM) and a foreign object debris (FOD) check was completed. No impact to operations.

June 2, 2022


A Skyquest Aviation Cessna 152 (C-GTYQ) on a VFR flight plan from Langley, BC (CYNJ) to Langley, BC (CYNJ) requested, and was cleared for, a left downwind departure to the north off of Runway 19. The aircraft turned right on departure, became lost and required navigational assistance (vectors) to depart off the right downwind. No operational impact.

May 23, 2022


A West Coast Kit Planes Ltd. amateur-built Murphy Rebel (C-FTWO) on a flight to Abbotsford, BC (CYXX) landed on Runway 19 and reported that they had lost their tail wheel. The pilot was unsure if they lost it on landing or somewhere en route. A subsequent runway inspection did not find anything. No operational impact.

April 22, 2022


A Principal Air Cessna 152 (C-GMGI) from Abbotsford, BC (CYXX) to Abbotsford, BC (CYXX) reported being lost, disoriented, and in a cloud. The pilot had difficulty remaining VFR. The pilot was instructed to contact the Victoria Terminal for further assistance. The aircraft in the circuit were instructed to land temporarily. C-GMGI was able to return to CYXX and landed safely.

April 3, 2022

Incident at FORT NELSON BC (CYYE) (FOD (foreign object debris))

A privately registered Stinson 108-3 on a flight to Fort Nelson, BC (CYYE) landed Runway 04 at 2134Z in strong crosswinds, and during taxi lost control and dragged a wing tip. The aircraft indicated they did not require any assistance and no injuries were reported. The aircraft slowly taxied and exited safely at 2147Z. Vehicle (ST25) conducted a runway check for foreign object debris (FOD) and reported finding several small pieces of glass. No further impact to operations.

March 24, 2022

Incident at 4910N / 12205W

A 1299750 B.C. Ltd. Cessna 414A (C-GWMT) enroute as a VFR flight from Chilliwack, BC (CYCW) to Victoria, BC (CYYJ) lost communication with the air traffic controller (ATC). Multiple attempts to re-establish contact were made. C-GWMT returned to Chilliwack and cancelled its flight plan through the Flight Information Centre (FIC). No operational impact.

March 25, 2022


An International Flight Centre Cessna 172M (C-GIEL) from Vancouver/Boundary Bay, BC (CZBB) to Vancouver/Boundary Bay, BC (CZBB) phoned the CZBB tower east of the control zone to report they had lost communications and had no transponder. Clearance was given via phone into the zone and then light signals were given on final. The aircraft landed safely, with no issues.

March 21, 2022

Incident at 14NM NANAIMO BC NDB (YCD)

An Iskwew Air Inc. Piper PA-31-350 (C-GPAK/SG304) from Qualicum Beach, BC (CAT4) to Vancouver, BC (CYVR) lost its global positioning system (GPS) while on the departure procedure.

March 15, 2022

Incident at KAMLOOPS FIC / FIC DE KAMLOOPS (ATM - inaccurate aeronautical information, ATM - weather observation systems)

At approximately 2320Z, the Collaborative Flight Planning Services (CFPS) weather displays/information lost "connectivity" with the source servers and would not function or update. Access to the flight plan template database appeared to be operating properly. The Flight Information Centre (FIC) reverted to alternate/back-up sources for the pilot briefing service (PBS) weather data. Failure of CFPS components are nationwide. Coordination with the Technology Operations Coordinator (TOC) and other FICs indicate the outage was unplanned and on-going.

March 17, 2022


A Hoarfrost River Huskies Ltd. Found Brothers FBA-2C1 (C-FFRB) on a flight to Fort Nelson, BC (CYYE) lost control upon landing on Runway 08. The aircraft departed the runway surface and impacted a snow bank.

March 15, 2022

Incident at WTMAN intersection

An Emil Anderson Air Ltd. Beech 200 (C-GEAG) from Terrace, BC (CYXT) to Kelowna, BC (CYLW) reported encountering severe turbulence descending through 8000ft. Lost 1500ft in altitude.

February 16, 2022


A Skyquest Aviation Cessna 172M (C-GEIT) from Langley, BC (CYNJ) to Tofino/Long Beach, BC (CYAZ), inbound for Runway 11, lost its radio and transponder after receiving the inbound advisory. Another aircraft that was inbound was able to make visual contact with C-GEIT and confirmed that C-GEIT was still inbound. The pilot was able to reset electrical and made contact on the radio. C-GEIT landed safely at 2059Z.

January 28, 2022

Incident at Kelowna (Aerodrome, runway or taxiway shutdown)

An Okanagan Aviation Academy Cessna 172M (C-GJES) from Salmon Arm, BC (CZAM) to Kelowna, BC (CYLW) touched down and made a left turn on the runway, into the snow on the east side of the runway. Crash alarm was pulled, and emergency vehicles attended the scene right away. The runway was closed via NOTAM.
UPDATE: TSB Report #A22P0006: C-GJES, an Aurora Aviation Academy Inc. Cessna 172M, was conducting flight training exercises near Kelowna Intl, BC (CYLW) with a student pilot on board. During the landing roll at CYLW, directional control was lost. The aircraft departed the left side of the paved surface of Runway 34, in the vicinity of Taxiway B. The aircraft did not collide with any obstacles. The aircraft became stuck in the snow and the student pilot shut down the engine to prevent a prop strike. Aircraft rescue fire fighting personnel responded and assisted with towing the aircraft back onto the runway. There were no injuries and no apparent damage to the aircraft. The operator will complete an aircraft maintenance inspection prior to returning the airplane to service.

July 11, 2022

Incident at TORONTO / BILLY BISHOP TORONTO CITY AIRPORT ON (CYTZ) (ATM - inaccurate aeronautical information)

Answering the 9240 line caused a full Frequentis system failure. It was automatically rebooted. All stations lost all communications.

June 14, 2022

Incident at 10NM BOXUM intersection

A Jazz de Havilland DHC-8-402 (JZA8430) from Timmins/Victor M. Power, ON (CYTS) to Toronto/Lester B. Pearson, ON (CYYZ) reported an emergency locator transmitter (ELT) signal at 1645Z. The signal was lost at 1646Z.

May 29, 2022


The pilot of a privately registered Piper PA-28R-200 on a flight to Kitchener/Waterloo, ON (CYKF) called on the phone to report that their aircraft had lost all electrical. They intended to land at CYKF. The CYKF tower was advised and had the London flight information centre (FIC) tell the pilot to call the tower in the cab directly in order to accommodate the landing.

April 28, 2022


A Sault College of Applied Arts and Technology Zlin Z242L (C-FSCZ) from Sault Ste. Marie, ON (CYAM) to Sault Ste. Marie, ON (CYAM) lost its radio function while inbound, and turned towards a Sault College of Applied Arts and Technology Zlin Z242L (C-GLKU) from Sault Ste. Marie, ON (CYAM) to Sault Ste. Marie, ON (CYAM) and a Sault College of Applied Arts and Technology Zlin Z242L (C-GSOP) from Sault Ste. Marie, ON (CYAM) to Sault Ste. Marie, ON (CYAM) without communication. The other aircraft were moved and squawked 7600, then a phone call was received by the tower and the aircraft landed safely, getting landing clearance over the phone. One other aircraft in the circuit was instructed to complete a full-stop landing until communication with the other aircraft could be re-established.

April 12, 2022

Incident at 25NM LONDON ON (CYXU)

A St. Catharines Flying Club Piper PA-28-161 (C-GYGZ) from St. Catharines/Niagara, ON (CYSN) to St. Thomas, ON (CYQS) called for assistance. The aircraft was lost and unable to find its bearing, and it described the surroundings as "close to water". The aircraft was visible on radar and was passed to the Toronto area control centre (YYZ ACC). The YYZ ACC provided the aircraft with flight following services to CYQS.

April 9, 2022

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

The main radar feed was lost temporarily. Switched to fallback feed. No impact to operations.

January 13, 2022


TSB Report #A22C0006: C-FDOD, a Bell Helicopter Textron 412 operated by Wisk Air Helicopters, was returning from a work site on a power line to the work camp at Kingfisher Lake, ON, with the pilot and 6 passengers on board. While enroute, the No. 1 "FUEL LOW" (quantity) caution annunciator illuminated. The pilot commenced a precautionary landing and planned for a possible single engine landing. During the descent, at approximately 200 feet above ground level, the No. 1 engine (Pratt and Whitney Canada PT6T-3B) lost power, accompanied by illumination of the associated caution/warning annunciators. While on short final, the No. 2 engine began to fluctuate and then lost power. A successful auto-rotative landing was conducted onto the frozen, snow covered surface of Kingfisher Lake with both engines inoperative. There were no injuries and the helicopter was undamaged. The helicopter was refueled the next day and flown to the Kingfisher Lake camp. After further inspection, the helicopter was ferried to the operators maintenance base under a flight permit. The operators maintenance personnel subsequently discovered several discrepancies. Loose B nuts in the No.1 fuel tank prevented the ejector pump from transferring fuel aft, over the baffle, to the boost pump side of the fuel tank. The examination also determined that the No. 2 engine was starved for fuel due to leaking flapper valve plates that, in a normal flight attitude, allowed fuel to move forward, through the baffle, at a rate that exceeded the recapture capacity of the ejector pump. The effect of these discrepancies was to trap unusable fuel forward of the baffle in each fuel tank. Further discrepancies were noted such as a damaged No. 2 low level float switch and inaccurate fuel quantity indication systems. The operator is conducting checks on the remaining aircraft in the fleet.

March 14, 2022


A 1534252 Alberta Ltd. Cirrus SR22 (C-GGWW) from Edenvale, ON (CNV8) to Kitchener/Waterloo, ON (CYKF) lost its magneto, declared "PAN PAN" and landed at CYKF without further incident.

February 16, 2022

Incident at SUDBURY ON (CYSB) (Aerodrome, runway or taxiway shutdown)

A Bearskin Airlines Swearingen SW4 (BLS370) from Sudbury, ON (CYSB) to North Bay, ON (CYYB) lost its nose gear steering at the threshold of Runway 22. The aircraft was disabled for a few minutes. An inbound Morningstar Air Express Cessna 208B (MAL8056) from Toronto/Lester B. Pearson, ON (CYYZ) to Sudbury, ON (CYSB) and an outbound Air Bravo Pilatus PC-12 (AB237) from Sudbury, ON (CYSB) to Moosonee, ON (CYMO) had minor delays while BLS370 slowly taxied clear.

February 24, 2022


An Alaskan Airlines flight reported on frequency 121.5 MHz that there was an issue with a passenger. Contact (CTC) with the aircraft was lost without further details.

January 31, 2022

Accident at STRATFORD MUNI ON (CYSA) (Aerodrome, runway or taxiway shutdown)

During landing, a privately registered Piper PA-46-600TP, on a flight to Stratford, ON (CYSA), went off the end of Runway 17 at CYSA, causing damage to the aircraft.
UPDATE: Aviation Incident Report #17507: A privately registered Piper PA-46-600TP on a flight to Stratford, ON (CYSA) was landing on Runway 17. It appeared that the directional control was lost and the aircraft exited the runway to the right-side. The aircraft struck an abbreviated precision approach path indicator (APAPI) light box and continued travelling across the graded area, and came to rest perpendicular to the runway edge. Weather conditions were VFR, with winds from the south and less than 8 knots. The runway was 95% bare and dry. Runways were closed for several hours.
UPDATE: TSB Report #A22O0013: A privately registered Piper PA-46-600TP was on a visual flight rules flight from Kitchener/Waterloo, ON (CYKF) to the Stratford, ON (CYSA) with the pilot as sole occupant. During the landing roll on Runway 17, the pilot felt the aircraft swerving and attempted a correction before deciding to reject the landing. After they added power for the go-around, the right main wheel entered the snowbank beside the runway, causing the aircraft to exit the runway surface into an area of undisturbed snow. The aircraft collided with some airport signage before the nose wheel sheared off. The aircraft came to a stop upright in a snow covered area beside the runway. The pilot exited the aircraft uninjured, the aircraft had been damaged significantly. The propeller was destroyed, and there was damage to the wing, cowling, and engine mounts. The ELT was activated during the runway excursion.

January 8, 2022


A Brampton Flying Club Bellanca 7ECA (C-GONI) on a VFR flight from Brampton-Caledon, ON (CNC3) to Brampton-Caledon, ON (CNC3) lost their ability to transmit to the Toronto/Billy Bishop, ON (CYTZ) tower while sightseeing over the downtown area. The aircraft was able to hear instructions. The aircraft exited the CYTZ control zone (CZ) and squawked 7600. C-GONI regained communication at 2108Z.

January 4, 2022

Incident at In the vicinity of: KITCHENER / WATERLOO ON (CYKF)

A Canadian Air National Inc. Cessna 172M (C-GWCZ) from Kitchener/Waterloo, ON (CYKF) to Kitchener/Waterloo, ON (CYKF) departed from CYKF and lost its radio transmitting ability. The aircraft landed safely at CYKF.

July 4, 2022

Incident at IQALUIT NU (CYFB)

At 0027Z, the Montreal Area Control Centre (CZUL) advised that a Keewatin Air Pilatus PC-12/45 (KEW401+) coming in from Mary River, NU (CMR2) to Iqaluit, NU (CYFB) had lost a generator and, because of this, had lost their de-icing capabilities. The flight service station (FSS) advised the Aircraft Rescue and Fire Fighting (ARFF) unit and the airport manager (APM). KEW401+ landed safely at 0110Z and taxied off the runway under its own power. ARFF and APM advised. No impact on operations.

July 5, 2022


Alerting was lost for a Harvs Air Service Ltd. Cessna 152 (C-GFJV) from Steinbach (South), MB (CKK7) to Steinbach (South), MB (CKK7) as a result of a visual flight rules (VFR) flight plan being closed prematurely at Winnipeg/St. Andrews, MB (CYAV).

July 7, 2022

Incident at REGINA INTL SK (CYQR) (Aerodrome - power failure, ATM - NAVAIDS/radar, ATM - inaccurate aeronautical information)

A brief power failure occurred while the technology operations coordinator (TOC) was performing scheduled maintenance on the uninterruptible power system (UPS) at 1920Z. All systems were briefly lost, including the Extended Computer Display System (EXCDS), the National Voice Communication System (NVCS), and the NAV CANADA Auxiliary Radar Display System (NARDS). Mandatory frequencies for 3 remote aerodrome advisory service (RAAS) units were unserviceable (U/S) for approximately 3 minutes while the NVCS came back online. Operations not affected.

July 4, 2022

Accident at LITTLE GRAND RAPIDS MB (CZGR) (Aerodrome, runway or taxiway shutdown)

At Little Grand Rapids, MB (CZGR), Runway 18/36 was closed due to a disabled aircraft.
Aviation Incident Report: Around 14h45 Central Daylight Time (CDT) on July 4th, 2022, the Royal Canadian Mounted Police (RCMP) unit was advised by Little Grand Rapids, MB (CZGR) Airport Manager of an incident involving a Cessna veering off the main runway. According to a pilot who was in the Airport terminal at the time and witnessed the incident, a Lakeside Aviation Cessna 172M (C-GHXS) “flared” too long while landing and touched down after the main taxiway. After landing, the plane veered on the right side (south) of the runway. It appears the plane briefly lost ground contact on its right side wheel, resulting in the left wing touching the ground and sustaining damage. The plane then went into the ditch, which is covered in vegetation. From inspection, it appears the propeller touched the ground and sustained damage. Airport staff immediately attended to the plane and removed the pilot and passenger. The passenger complained of soreness to the leg and was transported for medical treatment. Upon follow up, the passenger has soreness but no further injuries. The pilot declined medical treatment. A statement from the pilot was obtained. The pilot could not explain what went wrong, stated the plane veered after landing at normal speed and with normal brake application. It was initially suspect that the plane may have blown a tire after landing, however, the plane was pulled out of the ditch and the tires appeared to be fine. It is suspected that the brake system may have been faulty. There was no smoke or fire after the crash.

June 15, 2022


Multiple aircraft, including an Air Canada Airbus A320 (ACA1113) from Toronto/Lester B. Pearson, ON (CYYZ) to Regina, SK (CYQR), reported an emergency locator transmitter (ELT) signal. Signal was lost after 2 minutes.

June 2, 2022

Incident at EBGAL intersection

A WestJet Boeing 737-800 (WJA1401) from Las Vegas, NV (KLAS) to Calgary, AB (CYYC) declared an emergency upon initial contact with CYYC arrival. The electronic control of the trim system had been lost. The aircraft was vectored to final for Runway 17L and landed at 0001Z without issue.

May 11, 2022


A Government of Canada, Department of National Defence Canadair CT-114 Tutor (SNBD5) from Kelowna, BC (CYLW) to Calgary, AB (CYYC) (flight of 3), inbound on the IGVEP6 arrival and cleared to 10,000 feet, deviated eastbound off the standard terminal arrival (STAR) route. The arrival controller noticed the deviation and turned SNBD5 northbound back towards the STAR. At this point, SNBD5 descended out of 10,000 feet to 9,300 feet as a WestJet Boeing 737-700 (WJA461) from Calgary, AB (CYYC) to Kelowna, BC (CYLW) was close by, direct BOTAG, at 9,000 feet. The arrival controller climbed SNBD5 back to 10,000 feet and turned the aircraft to a heading of 070. WJA461 descended on a traffic alert and collision avoidance system (TCAS) resolution advisory (RA). IFR separation was lost.

May 10, 2022

Incident at In the vicinity of: FORT SIMPSON NT (CYFS)

A South Nahanni Airways Cessna U206G (C-GQOA) from Wrigley, NT (CYWY) to Fort Simpson, NT (CYFS) lost its radio and landed without contacting the community aerodrome radio station (CARS) observer/communicator (O/C) while a vehicle was on the runway.

April 15, 2022


A Sunwest Aviation Ltd. Learjet 45 (CNK645) from Vancouver, BC (CYVR) to Lethbridge, AB (CYQL) departed FL410 without a clearance, climbed to FL413 and then descended to FL406. CNK645 halted descent before separation was lost with a British Airways 787-10 (BAW49) from London/Heathrow, United Kingdom (EGLL) to Seattle-Tacoma, WA (KSEA). No impact to operations. (This record replaces CADORS 2022P0530, which was deleted due to incorrect region)