A United Airlines Boeing 767-300 (UAL18) from Milan/Malpensa, Italy (LIMC) to Newark Intl, NJ (KEWR) reported severe turbulence at FL360. The aircraft descended to FL350. Flight information centre (FIC) advised.

The Joint Rescue Coordination Centre (JRCC) Trenton was notified of an emergency locator transmitter (ELT) signal in the vicinity of the Brockville/Tackaberry regional airport, ON (CNL3). No VFR aircraft in the vicinity, broadcast on 123.15 MHz and 123.375 MHz; no response. Confirmation with the Ottawa/Macdonald-Cartier International Airport, ON (CYOW) terminal that an Air Canada Airbus 220-300 (ACA606) 40 NM southeast (SE) of CYOW at FL350 had heard the ELT signal. Source of signal unknown.

TSB Report #A22F0013: C-GJYE, an Air Canada A220-300 (BD-500-1A11) was conducting flight ACA782 from Los Angeles Intl, CA (KLAX) to Montreal/Pierre Elliott Trudeau Intl, QC (CYUL). During cruise, approximately 115 nautical miles SW of Denver Intl, CO (KDEN), the flight encountered momentary severe turbulence. Flight crew initiated a slow descent to FL350. All passengers and cabin crew were seated at the time (no injuries) as flight crew was advised of turbulence in the area prior to the event. The aircraft stayed within the performance envelope and the flight landed in CYUL without further incident. Maintenance determined that the aircraft did not exceed any performance threshold and no further action was required.

An American, corporately registered Gulfstream G-IV (N473CW) from Shannon, Ireland (EINN) to Minot, ND (KMOT) was at FL380. The pilot advised the controller of a pressurization issue and requested descent to FL300. The aircraft was cleared as requested. During descent, the pilot advised that they wanted to level at FL350. The aircraft was cleared at FL350 and continued to destination. No emergency was declared.

An ACASS Canada Ltd. Bombardier CL-600-2B16 (C-GQPA) from Vancouver, BC (CYVR) to Montreal/Pierre Elliott Trudeau, QC (CYUL) was observed on surveillance climbing through FL360 above their cleared altitude of FL350. The aircraft requested and was cleared to climb to FL370. When queried about their climb without a clearance, the pilot advised it was a "misinterpretation of their controller-pilot data link communications (CPDLC)". No operational impact.

A WestJet Boeing 737-700 (WJA4015) on a flight plan from Fort MacKay/Firebag, AB (CYFI) to Edmonton, AB (CYEG) was climbing to a cleared altitude of FL340. A Condor Flugdienst Boeing 767-300 (CFG2033) on a flight from Seattle/Tacoma, WA (KSEA) to Frankfurt, Germany (EDDF) was cleared to FL350. At 0300Z, WJA4015 reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) with CFG2033 and descended to FL333. No impact to the operation.

A Flair Airlines Boeing 737 MAX 8 (FLE789) from Edmonton, AB (CYEG) to Burbank-Glendale-Pasadena, CA (KBUR) was en route to KBUR and assigned a climb to FL350. FLE789 was unable to stop the climb and continued to FL361. FLE789 reported a mountain wave turbulence and requested FL370. The aircraft was then unable to continue their climb and started to descend. FLE789 then requested descent to FL350, and then subsequently FL330. No impact to operations.

The Edmonton area control centre (ACC) reported that their information on a WestJet Boeing 737-800 (WJA1511) from Los Angeles, CA (KLAX) to Calgary, AB (CYYC) showed a coordinated altitude of FL380. The Seattle (SEA) air route traffic control center (ARTCC) executed a verbal hand-off for WJA1511 at FL350. When queried, they said they showed FL350 as the coordinated flight level. No impact to operations.

A United Airlines Boeing 757-200 (UAL316) from Dublin, Ireland (EIDW) to Newark, NJ (KEWR) was cleared at FL350. UAL316 was observed climbing to FL357 and then returning to FL350. No traffic.

At 1227Z, Reykjavik called to coordinate FL350 for a United Airlines Boeing 757-224 (N12116/UAL913) from Keflavik, Iceland (BIKF) to Chicago/OHare, IL (KORD). The Gander air traffic control (ATC) updated the profile for a United Airlines Boeing 757-224 (N12125/UAL139) from Keflavik, Iceland (BIKF) to Newark, NJ (KEWR). No impact.

A Tap Air Portugal Airbus A321-271NX (TAP215) from Lisbon/Humberto Delgado, Portugal (LPPT) to Boston/Logan, MA (KBOS) reported severe turbulence at FL360 and FL350. The aircraft descended to FL320. The London (XU) flight information center (FIC) was advised. Significant meteorological information (SIGMET) O1 issued.

An Air France Boeing 777-300 (AFR055) from Washington-Dulles, VA (KIAD) to Paris/Charles de Gaulle, France (LFPG) reported severe turbulence at FL350. The aircraft moved to FL330, with no reported damage or injuries. No impact to operations. The London (XU) Flight Information Centre (FIC) was notified.

A Flugfelagid Atlanta HF (Air Atlanta Icelandic) Boeing 747-400 (TFAMI/ABD764) from Frankfurt, Germany (EDDF) to Chicago/Rockford, IL (KRFD) reported moderate to severe turbulence at FL340 for 5 minutes and then moved to FL350 and the ride was a lot better. The London (XU) flight information center (FIC) was advised, no injuries, separation was assured, safety was not jeopardized, no impact on operations.

An Icelandair EHF Boeing 767 300 (ICE615) from Reykjavik/Keflavik, Iceland (BIKF), to New York/John F. Kennedy, NY (KJFK) was southbound at level towards FL360 when it responded to a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) concerning a Dassault Falcon 900EX (C-GTLA) from Montréal/Pierre Elliott Trudeau, QC (CYUL) to Halifax/Stanfield, NS (CYHZ) which was climbing eastbound out of FL350. Information concerning the aircraft was transmitted. ICE615 climbed to FL367 and descended shortly afterwards.

A DHL Air Limited Boeing 767-300 (GDHLG/DHK377) from Covington/Cincinnati, KY (KCVG) to East Midlands, United Kingdom (EGNX) reported moderate to severe turbulence at FL350. The aircraft climbed to FL370 and reported a much better ride. The London (XU) flight information centre (FIC) was informed. No reported injuries and no impact on operations.

A Nolinor Aviation Boeing 737-2B6C (C-GNLN/NRL567), from Meadowbank, NU (CMB2) to Val-dOr, QC (CYVO), in level flight at FL350, declared "MAYDAY" and requested a descent to 10,000 feet due to depressurization. NRL567 eventually cancelled the emergency and landed at CYVO at 2155Z.
UPDATE: TSB Report #A21Q0121: C-GNLN, a Nolinor Aviation Boeing 737-200 operating as flight NRL567, was on an instrument flight rules (IFR) flight from Meadowbank, NU (CMB2) to Val-d’Or, QC (CYVO). While the aircraft levelled at FL350, the crew received a depressurization warning. The crew immediately began an emergency descent to 10,000 ft and declared a distress (MAYDAY) to air traffic control. Once it reached 10,000 ft altitude, the aircraft continued its route to CYVO. The crew eventually cancelled the emergency alert and the aircraft landed without incident. There were no injuries.

An Ethiopian Airlines Boeing 777-300 (ETASL/ETH3600) from Anchorage, AK (PANC) to Chicago/OHare, IL (KORD) reported severe turbulence at FL370. The aircraft descended to FL350 and said the flight was smooth through FL356.

A WestJet Boeing 737-800 (WJA724) from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson, ON (CYYZ), at FL350, reported that a laser originating from the vicinity of Nelson, BC (CZNL) had illuminated the cockpit. The event was reported to Emergency Communications (911) at 0644Z.

An Asiana Airlines Boeing 747-400 (HL7616/AAR587) from Anchorage, AK (PANC) to New York/John F. Kennedy, NY (KJFK) advised loss of autopilot and inability to maintain FL350 (plus or minus 300ft). Five minutes later, the aircraft advised autopilot was operational, altitude keeping was normal and reduced vertical separation minimum (RVSM) was confirmed.

TSB Report #A21F0233: C-FYJO, a Sunwing Airlines Inc. Boeing 737-8K5, was conducting flight SWG422 from La Altagracia/Punta Cana Intl, Dominican Republic (MDPC) to Toronto/ Lester B. Pearson Intl, ON (CYYZ). During cruise at FL350 in the vicinity of Elizabeth City Coast Guard Air Station, NC (KECG), ATC gave the flight crew clearance to proceed direct to the OPHEA intersection. After the flight crew turned direct to OPHEA, ATC then instructed them to turn to the right of track heading 210. Shortly after, ATC instructed the flight crew to descend to FL340. The flight crew began the descent, then ATC instructed them to expedite the descent to FL340. During the descent, the flight crew received a TCAS RA (resolution advisory). Flight crew complied with the RA and informed ATC. Once clear of the conflict, ATC cleared the flight crew direct to OPHEA, followed by a climb back to FL350. Flight proceeded to its destination without further incident.

TSB Report #A21F0215: C-FRTU, an Air Canada B787-9, was operating flight ACA0990 from Mexico City/Benito Juarez Intl, Mexico (MMMX) to Toronto/Lester B. Pearson Intl, ON (CYYZ). The crew reported a TCAS R/A that occurred while in cruise in Cleveland Centres airspace. Cleveland ATC cleared a descent from FL390 down to FL350, the crew initiated the descent and received a R/A for traffic below. R/A was followed and the flight continued to CYYZ, without further incident.

An American Airlines Boeing 787-9 (N837AN/AAL9817) from Dallas/Fort Worth, TX (KDFW) to Incheon, South Korea (RKSI) reported an operational issue that required a descent to FL350 and a diversion to Anchorage, AK (PANC). No emergency declared. No impact to the operations.

A Swoop Boeing 737-800 (WSW204) from Abbotsford, BC (CYXX) to Edmonton, AB (CYEG) declared PAN PAN due to a fuel issue. They requested priority landing. No emergency vehicles required. The aircraft landed without incident at 1731Z. No impact to operations.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. During cruise altitude at FL350 into Edmonton, AB (CYEG) airport, the flight crew had a "Master Caution Engine" annunciation with engine electronic control (EEC) lights illuminated, a display source #2 flag and both #1 and #2 fuel filter bypass lights illuminate. The crew called in a "PAN PAN" due to the multiple defects and landed safely in CYEG airport. CYEG maintenance attributed the defects to a faulty #2 Display Electronic Unit (DEU). The DEU was replaced, with no further issues noted.
UPDATE: TSB Report #A21W0104: C-FLBV, a Boeing 737-800 operated by Swoop Inc., was conducting flight WSW204 from Abbottsford Intl, BC (CYXX) to Edmonton Intl, AB (CYEG) with 6 crew members and 157 passengers on board. Approximately 114NM SW of CYEG, the flight crew received a "DISPLAY SOURCE #2 FAIL" message with the corresponding Electronic Engine Control (EEC) overhead light illuminating. The flight crew completed the checklist for the EEC alternate mode and the "display source fail" condition. As the flight crew were completing the checklist, the overhead fuel filter bypass lights illuminated for both engines. The flight crew then completed the appropriate checklist for the fuel filter bypass, and declared a "PAN PAN" with ATC. The flight continued to the intended destination of CYEG, where an uneventful landing was completed. Company maintenance personnel replaced the #2 DEU, and the #1 and #2 engine fuel filters were inspected and replaced. After a satisfactory engine ground run, the aircraft was returned to service.

A WestJet Boeing 737-700 (WJA4020) on a flight from Calgary Intl, AB (CYYC) to Fort Mackay/Firebag, AB (CYFI) reported an engine failure and declared a MAYDAY. WJA4020 diverted to Edmonton Intl, AB (CYEG). Aircraft Rescue and Fire Fighting (ARFF) was requested. WJA4020 landed without incident at 1333Z. No impact to the operation.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. In short, several engine runs and troubleshooting steps were undertaken, with no fault found. The Hydro Mechanical Unit (HMU) and Electronic Engine Control (EEC) were replaced for troubleshooting and the aircraft was test flown, with no further fault. The aircraft has been returned to service and will be monitored. Service Difficulty Report (SDR) no. 20210927012 was also submitted.
UPDATE: TSB Report #A21W0083: C-GVWJ, a WestJet Airlines Ltd. Boeing 737-700, was operating as flight WJA4020 from Calgary Intl, AB (CYYC) to Fort MacKay, AB (CYFI). While in cruise at FL350, the #1 engine (CFM-56-7B24/3) experienced an un-commanded deceleration. The crew retarded the #1 throttle and brought it up again. The #1 engine reaccelerated and regained power with no further deceleration for the remainder of the flight. The crew elected to divert to Edmonton Intl, AB (CYEG). An emergency was declared and the flight landed at CYEG uneventfully. Maintenance update: After extensive troubleshooting and analysis of the FDR, the #1 EEC was replaced. A successful test flight was undertaken and the aircraft was returned to service.

A Morningstar Air Express Inc. Boeing 757-2B7 (C-FMHA/MAL7070) from Edmonton, AB (CYEG) to Winnipeg/James Armstrong Richardson, MB (CYWG) declared "PAN PAN" at FL350 due to a cabin pressure issue and requested descent to 14,000ft above sea level (ASL). The pilot reported that the situation normalized while descending through FL230 and requested to level off at FL210. MAL7070 continued to its destination with no further issues. No impact to operations.
UPDATE: TSB Report #A21C0022: C-FMHA, a Boeing 757-200 aircraft operated by Morningstar Air Express Inc., was conducting flight MAL7070 from Edmonton, AB (CYEG) to Winnipeg/James Armstrong Richardson, MB (CYWG). While cruising at FL350, the flight crew received a "Cabin Alt" master warning. The cabin altitude was noted to have risen above 10 000 feet with the outflow valve fully closed. The flight crew declared "PAN PAN", and requested a descent to 14,000 feet above sea level. As the aircraft descended through FL230, the flight crew reported normal pressurization and requested FL210. The flight continued to its destination without further incident. The aircraft was operating with an inoperative right-hand air conditioning pack that had been deferred in accordance with the minimum equipment list (MEL), which restricted operation to a maximum altitude of FL350. However, the aircraft was unable to maintain maximum cabin differential pressure at the flight planned FL350. The next leg of flight MAL7070 was cancelled pending the replacement of the air conditioning pack and clearing the MEL item.
UPDATE: Aviation Incident Report #16999: A Morningstar Air Express Boeing 757-2B7 (C-FMHA/MAL7070) from Calgary, AB (CYYC) to Winnipeg/James Armstrong Richardson, MB (CYWG) received a master warning message "Cabin Alt" while en route between CYYC and CYWG. The cabin altitude was above 10,000 feet with the outflow valve fully closed. A "PAN PAN" was declared and the crew started to descend until a reasonable cabin altitude was reached. Upon arrival in CYWG, MAL7070 was declared "aircraft on ground" (AOG). Necessary parts for the repair were shipped on a Morningstar Air Express aircraft (MAL7079) from Toronto/Lester B. Pearson, ON (CYYZ) to Winnipeg/James Armstrong Richardson, MB (CYWG). MAL7070s second scheduled leg from Winnipeg/James Armstrong Richardson, MB (CYWG) to Toronto/Lester B. Pearson, ON (CYYZ) was cancelled. A Morningstar Air Express aircraft (MAL8079) was rerouted from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson, ON (CYYZ), with an en route stop at Winnipeg/James Armstrong Richardson, MB (CYWG). A Morningstar Air Express aircraft (MAL7940) from Toronto/Lester B. Pearson, ON (CYYZ) to Winnipeg/James Armstrong Richardson, MB (CYWG), returning Toronto/Lester B. Pearson, ON (CYYZ), was set up as an ad hoc flight in order to recover the freight.

A Canadian North Inc. Boeing 737-300 (MPE1724) from Edmonton, AB (CYEG) to Fort MacKay/Horizon, AB (CYNR) was cleared to FL340. At 2232Z, air traffic control (ATC) observed MPE1724 climbing through FL340 to FL350. ATC instructed MPE1724 to descend to FL340. No impact to operations.

A United Airlines Boeing 787-9 (N29981/UAL829) from Newark, NJ (KEWR) to Mumbai, India (VABB) encountered severe turbulence at FL330, then climbed to FL350. No impact to operations.

A TAP Air Portugal Airbus A321-271NX (TAP231) from Lisbon, Portugal (LPPT) to Washington/Dulles, VA (KIAD) was approved for FL350, westbound. No impact to operations.

An Air France Boeing 777-300 (FGSQJ/AFR023) from New York/John F. Kennedy, NY (KJFK) to Paris/Charles de Gaulle, France (LFPG) reported severe turbulence at FL370 and descended to FL350. No operational impact.

An Air France Boeing 777-300 (AFR055) from Washington-Dulles, VA (KIAD) to Paris/Charles de Gaulle, France (LFPG) reported moderate to severe turbulence at FL350. The aircraft stated that it lasted less than a minute. The aircraft later climbed to FL360. No impact to operations. The London (XU) flight information centre (FIC) was notified.

A United Airlines, Inc. Boeing 777-300 (UAL40) from Newark, NJ (KEWR) to Rome, Italy (LIRF) reported moderate to severe turbulence at FL350. The aircraft did not change levels, but did deviate away from the storm. London, ON (XU) Flight Information Centre (FIC) advised. No impact on operations or injuries reported.

At 1542Z, a United Airlines Boeing 777-200 (UAL125) on a westbound flight from Athens, Greece (LGAV) to Newark Intl, NJ (KEWR) declared a medical emergency via controller-pilot data link communications (CPDLC) and requested a diversion to St. Johns Intl, NL (CYYT). The flight was descended from FL360 to FL350 and re cleared 51N040W 4830N050W YYT.

A United Airlines Boeing 777-300 (UAL385) from Newark, NJ (KEWR) to Dubrovnik, Croatia (LDDU) reported severe turbulence at FL350. The aircraft lost 200ft of altitude, then returned back to FL350. No reported damage or injuries. The London (XU) flight information centre (FIC) was notified. No separation issues or impact to operations.

An Emirates Boeing 777-200 (UAE222) from Dallas/Fort Worth, TX (KDFW) to Dubai, United Arab Emirates (OMDB) reported severe turbulence at FL350. The aircraft did not change altitude. No impact to operations.

An Iberia Airlines Airbus A330-300 (IBE6252) from New York/John F. Kennedy, NY (KJFK) to Madrid–Barajas, Spain (LEMD) reported severe turbulence at FL350. The aircraft (A/C) did not change levels. The "XY" flight information centre (FIC) was notified. No impact on operations.

An Aerospace Hawker 800XP (MVNES), registered in the United Kingdom, from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Montreal/Pierre Elliott Trudeau, QC (CYUL), climbing from FL290 towards FL350, 5NM from RABIK, suddenly executed a turn of about 60 degrees to the south. When questioned, the aircraft mentioned having an autopilot problem. The aircraft was reauthorized en route. No impact on operations.

At Kuujjuaq, QC (CYVP), an Integrated Information Display System (IDDS) satellite link failure occurred due to poor weather in Montreal. Failure of the NAV CANADA Auxiliary Radar Display System (NARDS), the Extended Computer Display System (EXCDS), and Nuvilik frequency 135.1 from 1825Z to 1900Z. Impact on operations: an Air Inuit Ltd. Boeing 737-300 (AIE782) from Montreal/Trudeau, QC (CYUL) to Kuujjuaq, QC (CYVP) had to wait 5 minutes to compensate at FL350 before receiving the air traffic control (ATC) authorization (transmitted by the flight service station (FSS)) for descent. No other impact.

An Airbus Canada aircraft (ABK386) reported a strong 15-second emergency locator transmitter (ELT) signal at FL350. The Joint Rescue Coordination Centre (JRCC) Trenton was advised. No impact on operations.
UPDATE: Supplemental information for the Airbus/Bombardier flight test crew reporting the signal: Aircraft being flown by the crew was an Air Baltic Airbus A220-300 (C-FOVG/ABK386).

At FL350, an Air Canada Boeing 777-300 (ACA848) from Toronto/Lester B. Pearson Intl, ON (CYYZ) to London/Heathrow, United Kingdom (EGLL) reported an intermittent emergency locator transmitter (ELT) signal between 0119Z and 0129Z. Joint Rescue Coordination Centre (JRCC) Trenton advised. No impact to operations.

TSB Report #A20F0039: C-FYJD, a B737-800 aircraft operated by Sunwing, was conducting flight SWG677 from Varadero Juan Gualberto Gomez (MUVR), Cuba to Vancouver Intl (CYVR), BC. During cruise, severe turbulence was encountered in vicinity of Helena Regional (KHLN), MT while on descent from FL380 down to FL350. During the encounter there was a temporary loss of control of the aircraft which was subsequently regained. The seat belt sight was on and a PA was made to passengers to be seated. A passenger that was in the aft lavatory during the event and sustained minor injuries. The flight continued to destination without further incident.

An emergency locator transmitter (ELT) report was received from a Cargojet Airways Ltd. Boeing 757-200 (CJT925) from Covington/Cincinnati, KY (KCVG) to Vancouver, BC (CYVR) at FL350. No impact on operations.

A British Airways Boeing 777-300 (BAW116) from New York/John F. Kennedy, NY (KJFK) to London/Heathrow, United Kingdom (EGLL) reported continuous, moderate to severe turbulence at FL390-FL350, between the Yarmouth, NS, very high frequency omnidirectional range (VOR) /distance measuring equipment (DME) (YQI) and the Halifax, NS, VOR/DME (YHZ). The Halifax flight information centre (FIC) was notified and a pilot weather report (PIREP) was issued. No impact on operations.

The pilot of an Emirates Boeing 777-300 (UAE2556) from Newark, NJ (KEWR) to Dubai, United Arab Emirates (OMDB) reported severe turbulence at FL350. The flight information centre (FIC) was advised. No impact on operations.

The pilot of an American, corporately registered Gulfstream G280 (N776AG) from Shannon, Ireland (EINN) to Burlington, VT (KBTV) declared an emergency due to an engine failure, and requested clearance to Gander, NL (CYQX). N776AG was cleared as requested. The aircraft landed safely at 1826Z. No impact on operations.
UPDATE: TSB Report #A20A0040: N776AG, a privately operated Gulfstream G280 aircraft was conducting a flight from Shannon Intl (EINN), Ireland, to Burlington Intl (KBTV), Vermont. At about 45°49 North and 052°52 West, the number 02 engine (Honeywell HTF7250G) automatically shut down without warning. The crew declared an emergency, reviewed weather, and coordinated with ATC for a diversion to Gander Intl (CYQX), NL. The crew completed the engine fail checklists and decided not to attempt a restart of the engine. The APU was started below FL350 to facilitate electrical, environmental, and bleed air sources, and the flight landed at CYQX without further incident. Subsequent troubleshooting determined that false number 02 engine N2 overspeed logic caused the automatic shutdown of the engine. Gulfstream and Honeywell are collaborating on an investigation into the engine shutdown. The engine control units are with Honeywell for further evaluation.

TSB Report #A20A0011: C-FDSN, an Airbus A320 operated by Air Canada was conducting flight ACA680 from Toronto Lester B Pearson International Airport, ON (CYYZ) to St John’s International Airport, NL (CYYT). While in cruise at FL350, the number 2 engine rolled back to approximately 54% N1, while the number 1 engine remained at 92% N1. The crew descended to FL290 with auto thrust commanded to 85% and both engines responded. The flight continued to destination without further incident. Maintenance is investigating.

An American, corporately registered Learjet 36A (N81GJ) from St. Johns, NL (CYYT) to Hamburg, Germany (EDDH) descended without clearance from FL350 to FL290 and proceeded direct CYYT due to a medical emergency.

A United Parcel Service Co. McDonnell Douglas MD 11F (N286UP/UPS203) from Louisville, KY (KSDF) to Cologne/Bonn, Germany (EDDK), at FL330, received their ocean clearance via data link at FL350 and climbed without a climb clearance. There was no traffic, safety was not jeopardized, separation was assured, the operation was not affected.

At time 2202Z and just west of 50N050W, a British Airways Boeing 787-9 (GZBKD/BAW293) on a flight from Heathrow/London Intl, UK (EGLL) to Washington/Dulles, VA (KIAD) declared a PAN PAN due to a pressurization issue and requested descent from FL410 to FL350. The flight was recleared to FL340. BAW293 reported the situation good at FL340 and PAN PAN cancelled at 2215Z. Flight continued to its destination and exited the Gander Intl, NL (CYQX) flight information region (FIR) at 2248Z.
UPDATE TSB Report #A20A0006: G-ZBKD, an Boeing 787-900 operated by British Airways, was conducting flight BAW293 from London Heathrow Intl. (EGLL), UK to Washington Dulles Intl. (KIAD), VA. The aircraft dispatched with the right air conditioning pack inoperative in accordance with the MEL. During the cruise portion while at FL410, the left air conditioning pack failed, resulting in a PACK ALTITUDE LIMIT warning. The checklist required a descent to FL340. At 195 nm NE of St John’s International Airport, NL (CYYT), the crew requested FL340, however it was denied by ATC. The crew then declared a PAN-PAN due to the pressurization issue and a descent to FL340 was made. Once the aircraft reached FL340, the crew reported the situation was normal and cancelled the PAN-PAN and continued to destination without incident.

A LOT Polish Airlines Airbus A340-300 (OOABD/LOT46) on a flight from Toronto/Lester B. Pearson Intl, ON (CYYZ) to Warsaw, Poland (EPWA) experienced moderate turbulence, deviated off course and descended from FL370 to FL350. Air traffic control (ATC) re-cleared the aircraft. No impact on operations.

At 0207Z, a Boeing 777 aircraft from Chicago/OHare, IL (KORD) to Zurich, Switzerland (LSZH) reported severe turbulence (Svr turb) over CEFOU intersection at FL350.