July 9, 2022

Incident at 4543N / 07324W (Aerodrome, runway or taxiway shutdown)

An Air Canada Boeing 787-9 (C-FRSE/ACA845) from Frankfurt, Germany (EDDF) to Montréal/Pierre-Elliott-Trudeau, QC (CYUL) declared an emergency due to a flaps issue. Emergency vehicles were dispatched. The aircraft landed without incident at 1547Z. Oil was found after the runway was inspected. Runway 24R was closed until 1645Z. No other impact on operations.

June 12, 2022

Incident at QUÉBEC / JEAN LESAGE INTL QC (CYQB)

An Orizon Aviation Québec Inc. Cessna 152 (C-GBQK) from Québec/Jean-Lesage, QC (CYQB) to Québec/Jean-Lesage, QC (CYQB) aborted its takeoff because the aircrafts tail may have struck the ground ("tail strike") on departure from Runway 29. No foreign object debris (FOD) was found and there were no operational impacts.

May 24, 2022

Incident at OTTAWA / GATINEAU QC (CYND)

A tail strike on the ground occurred upon departure of a Richcopter Inc. Cessna 150M (C-GQHU) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND). The aircraft aborted its takeoff, then exited the runway and cancelled its flight. No impact on operations.

May 18, 2022

Incident at OTTAWA / GATINEAU QC (CYND)

A Richcopter Inc. Cessna A150M (C-GBGM) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND) experienced a tailstrike during takeoff procedures, ending in a rejected takeoff. The aircraft then exited the runway and aborted its flight. No impact on operations.

May 10, 2022

Incident at VAL-D'OR QC (CYVO)

A Provincial Airlines de Havilland DHC-8-311 (C-GPAR/PVL1972) from Montréal/Pierre-Elliott-Trudeau, QC (CYUL) to Val-d’Or, QC (CYVO) initiated a go-around due to excessive tail wind on final for Runway 36 (winds were 170 degrees at 9 kt). The aircraft veered 180 degrees and came back for an approach on Runway 18. No impact on operations.

May 3, 2022

Incident at OTTAWA / GATINEAU QC (CYND)

A Richcopter Inc. Cessna 150M (C-GYGH) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND) aborted its take-off due to a possible tail strike. The flight service station (FSS) requested that a Richcopter Inc. Cessna 150M (C-GUDB) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND), on final approach, conduct a go-around. After returning to the ramp for an aircraft (A/C) inspection, C-GYGH proceeded onto Taxiway Alpha without contacting the FSS at 1932Z. No impact.

Incident at OTTAWA / GATINEAU QC (CYND)

A Richcopter Inc. Cessna 150M (C-GYGH) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND) aborted its take-off a second time due to a possible tail strike. A privately registered Cessna 150K (C-GAEC) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND), on final approach, conducted a go-around.

April 1, 2022

Incident at 4625N / 07153W

While in flight, a Jazz Bombardier CL-600-2D24 (C-GPJZ/JZA8227) from Quebec/Jean-Lesage, QC (CYQB) to Toronto/Lester B. Pearson, ON (CYYZ) reported a change of destination to Montreal/Pierre-Elliott-Trudeau, QC (CYUL) due to a flaps issue. The aircraft did not declare an emergency or request assistance. No impact on operations.

March 11, 2022

Incident at OTTAWA / GATINEAU QC (CYND)

In the crosswind for Runway 09, a Richcopter Inc. Cessna 150M (C-FUAE) from Ottawa/Gatineau, QC (CYND) to Ottawa/Gatineau, QC (CYND) declared an emergency (flap problem). Emergency services were contacted by the air traffic services (ATS) unit. The aircraft landed safely at 1710Z. The emergency service request was cancelled by the ATS unit. No impact on operations.

March 7, 2022

Incident at QUÉBEC / JEAN LESAGE INTL QC (CYQB)

On approach to Quebec/Jean-Lesage, QC (CYQB), a Sunwing Airlines Boeing 737-800 (SWG609) from Holguin/Frank Pais, Cuba (MUHG) to Quebec/Jean-Lesage, QC (CYQB) asked to abort its approach due to a flaps issue. No emergency declared. SWG609 performed a few checks and requested to be rerouted to Montreal/Pierre-Elliott-Trudeau, QC (CYUL). SWG609 landed on Runway 24R at 0256Z without incident. No impact.

February 25, 2022

Incident at MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

On final for Runway 24R, a Sunwing Airlines Boeing 737-800 (SWG429) from Punta Cana, Dominican Republic (MDPC) to Montreal/Pierre-Elliott-Trudeau, QC (CYUL) asked to abort its approach due to flap problems. No emergency. SWG429 was instructed to fly the runway heading and climb to 3,000 ft. Despite a correct read-back, SWG429 deviated from the planned route and was observed climbing through 3,000 ft. A few minutes later, SWG429 reported having resolved its flap issues and landed without incident. No impact.

February 20, 2022

Incident at 3NM MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

An Air Creebec Inc. de Havilland DHC-8-103 (C-GZJC/CRQ205) from Montreal/Pierre Elliott Trudeau, QC (CYUL) to Val-dOr, QC (CYVO) returned to CYUL after a heat indication problem for the tail of the aircraft section. No emergency declared. No impact on operations.

February 7, 2022

Incident at MONTRÉAL / LES CÈDRES QC (CSS3)

An A.L.M. Par Avion Inc. Cessna 172N (C-GXIZ) from Montreal/Les Cèdres, QC (CSS3) to Montreal/Les Cèdres, QC (CSS3) reported an in-flight emergency (PAN PAN) related to a flap issue on frequency 121.5 MHz, and then landed at CSS3 without incident.

January 25, 2022

Incident at 78NM E PUVIRNITUQ QC (CYPX)

An Air Inuit Ltd. Boeing 737-2Q2C (C-GMAI/AIE754) from Kattiniq/Donaldson, QC (CTP9) to Montréal/Pierre-Elliott-Trudeau, QC (CYUL) declared an emergency due to flight control issues. AIE754 changed its destination to Puvirnituq, QC (CYPX). Emergency vehicles were dispatched and AIE754 landed without incident at 1915Z. No operational impact.
UPDATE: TSB Report #A22Q0008: C-GMAI, a Air Inuit Boeing 737-200 (AIE754) was on an instrument flight rules flight from Kattiniq/Donaldson, QC (CTP9) to Montreal/Pierre Elliott Trudeau International, QC (CYUL) with 52 passengers and 4 crew members on board. At flight level 180, the inside edge of the left-hand slat was observed to be in an asymmetric position. Although the controllability of the aircraft was not significantly affected, the crew declared an emergency and diverted to Puvirnituq, QC (CYPX), where the aircraft landed without incident. The aircraft was not damaged and there were no injuries. Following inspection by maintenance, the inboard slat actuator was replaced.
UPDATE: Aviation Incident Report #17551: An Air Inuit Ltd. Boeing 737-2Q2C (C-GMAI/AIE754) from Kattiniq/Donaldson, QC (CTP9) to Montréal/Pierre-Elliott-Trudeau, QC (CYUL), with an en route stop at Puvirnituq, QC (CYPX), took off from CTP9 heading south, but when they were east of CYPX, they re-routed to CYPX indicating they had a flight control problem and declared an emergency at 1857Z. CYPX emergency services, the fire department, ambulance and Nunavik Police were called. Police arrived at 1910Z. Emergency services were on standby for the aircraft to land. AIE754 landed safely without incident. CYPX universal communications (UNICOM) advised. CYPX emergency services were advised and a runway surface condition (RSC) report was sent after the incident.

July 21, 2022

Incident at VANCOUVER / BOUNDARY BAY BC (CZBB)

A Pacific Flying Club Cessna 172P (C-GBLP) from Vancouver/Boundary Bay, BC (CZBB) to Vancouver/Boundary Bay, BC (CZBB) aborted their takeoff and reported a tail strike. No impact to operations.

June 25, 2022

Incident at CASTLEGAR / WEST KOOTENAY REGIONAL BC (CYCG)

A Jazz de Havilland DHC-8-402 (C-GGMU/JZA8518) from Vancouver, BC (CYVR) to Castlegar/West Kootenay, BC (CYCG) indicated their flaps were stuck at 15 degrees. They were unable to land at CYCG and proceeded to Kelowna, BC (CYLW). The Vancouver Area Control Centre was advised.

June 21, 2022

Incident at Kelowna

A North Cariboo Flying Service Beech 1900D (NCB2048) from Kelowna, BC (CYLW) to Prince George, BC (CYXS) departed from Runway 16, reported a problem with their flaps, and returned to land without issue.

June 22, 2022

Incident at VICTORIA HARBOUR BC (Water) (CYWH) (Aerodrome, runway or taxiway shutdown)

A Kenmore Air Harbor Inc. de Havilland DHC-3 (N765KA) from Kenmore Air Harbor Seaplane Base, WA (KW55) to Victoria Harbour, BC (Water) (CYWH) reported a rudder issue upon landing, and was disabled on the landing area for 35 minutes until the aircraft was towed off. As a result, one arrival was delayed by 5 minutes.

May 23, 2022

Incident at ABBOTSFORD BC (CYXX)

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 21, 2022

Incident at ABBOTSFORD BC (CYXX)

A Swoop Inc. Boeing 737-8CT (C-FLSF/WSW407) from Abbotsford, BC (CYXX) to Toronto/Lester B. Pearson, ON (CYYZ) reported a bird strike after take-off, at 1000-1500 ft above ground level (AGL).
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. The operator reported that the listed tail registration of C-FLSF was in heavy check at that time. No other bird strikes were reported on that date.

April 7, 2022

Incident at FORT NELSON BC (CYYE)

An American, corporately registered Cub Crafters CC11-160 (N189PD) from Fort Nelson, BC (CYYE) to Watson Lake, YT (CYQH) was observed in a high speed taxi on Apron 1 towards Runway 22. The tail dragger was moving fast enough to lift the tail. The flight service station (FSS) made multiple attempts to contact the aircraft. The aircraft entered Taxiway Alpha and stopped at the runway hold short line before responding to the FSS. The aircraft departed without incident.

April 8, 2022

Incident at Kelowna

Shortly after departure, a Westair Aviation Inc. Piaggio P-180 Avanti (C-GFOX) from Kelowna, BC (CYLW) to Kelowna, BC (CYLW) reported a flap malfunction. The aircraft elected to return to the airport and advised they would be conducting a long landing. No declared emergency. Aircraft landed safely at 1829Z. No operational impact.

April 4, 2022

Incident at VANCOUVER INTL BC (CYVR) (FOD (foreign object debris))

An Air Canada Boeing 777-333ER (C-FNNW/ACA304) from Vancouver, BC (CYVR) to Montreal/Pierre Elliott Trudeau, QC (CYUL) reported a bird strike departing Runway 26L. One red tailed hawk was found , no operational impact.

April 11, 2022

Incident at KAMLOOPS BC (CYKA)

A Westjet Encore Ltd. de Havilland DHC-8-402 (C-FQWE/WEN3111) from Calgary, AB (CYYC) to Kamloops, BC (CYKA) executed a missed approach for Runway 27 due to a flap caution light appearing when 5 miles final. No operational impact.

March 27, 2022

Accident at 5223N / 12632W

At 1707Z, a West Coast Helicopters Maintenance and Contracting Eurocopter AS 350 B2 (C-FWCA) from Bella Coola, BC (CYBD) to Bella Coola, BC (CYBD) crash landed under unknown circumstances near Hagensborg, BC. The helicopter was conducting heli-skiing activities, but the pilot was the sole occupant at the time of the incident. There were no reported injuries. There was significant damage to the tail section. There was no NAV CANADA involvement.

March 13, 2022

Incident at VANCOUVER INTL BC (CYVR)

On departure, an Image Air Charter Ltd. Bombardier CL-600-2B16 (C-FOWK) from Vancouver, BC (CYVR) to Kelowna, BC (CYLW) experienced a flap issue, declared an emergency, and subsequently returned to CYVR. The aircraft landed safely at 1757Z.

February 11, 2022

Incident at 5025N / 11642W

A WestJet Encore Ltd. de Havilland DHC-8-402 (WEN3540) from Kamloops, BC (CYKA) to Calgary, AB (CYYC) declared a "PAN PAN" due to a flap failure. No assistance was required. The aircraft landed without incident at 1644Z. No impact to operations.

January 29, 2022

Incident at VANCOUVER / BOUNDARY BAY BC (CZBB)

A Pacific Professional Flight Centre Ltd. Cessna 152 (C-GQSS) from Vancouver/Boundary Bay, BC (CZBB) to Vancouver/Boundary Bay, BC (CZBB) reported a flaps malfunction upon departure. The pilot reported that the flaps were not staying in place and fluctuating between 10 degrees of the selected setting. The aircraft landed safely. No impact to operations.

January 15, 2022

Incident at In the vicinity of: VANCOUVER INTL BC (CYVR)

An Air Canada Boeing 787-9 (C-FGHZ/ACA518) from Honolulu/Daniel K. Inouye, HI (PHNL) to Vancouver, BC (CYVR) declared "PAN PAN" due to a flap drive control issue requiring a higher approach speed. ACA518 landed safely at CYVR at 1356Z.
UPDATE: TSB Report #A22P0004: C-FGHZ, an Air Canada Boeing 787-9 Dreamliner, was operating as flight ACA518 from Honolulu, HI (PHNL) to Vancouver, BC (CYVR) with 10 crew and 89 passengers on board. During cruise, the flight crew received an Engine Indicating and Crew Alerting System (EICAS) "Slat Drive" message. In consultation with company dispatch and the Maintenance Operations Center (MOC), the flight crew decided to continue to CYVR. A "Pan-Pan" was declared due to the requirement for a higher than standard approach speed. The flight landed without incident with ARFF on standby. Company maintenance replaced the inboard slat skew 6 sensor as per the Maintenance Manual and the aircraft was returned to service.

June 25, 2022

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

A United Airlines Boeing 737-824 (N27205/UAL643) from San Francisco, CA (KSFO) to Toronto/Lester B. Pearson, ON (CYYZ) initiated a missed approach to Runway 23. After troubleshooting, the aircraft declared an emergency due to a flap asymmetry issue. The Aircraft Rescue and Fire Fighting (ARFF) unit was deployed and UAL643 landed on Runway 23 at 1153Z without further incident (WOFI). No impact to operations.

June 21, 2022

Incident at HAMILTON ON (CYHM) (FOD (foreign object debris))

A Latitude Air Ambulance LearJet 35A (C-GAJS) on a MEDEVAC flight from Hamilton, ON (CYHM) to Boston, MA (KBOS) reported a bird strike (windshield) while departing from Runway 24. Maintenance found a baby red-tailed hawk, intact. Information was passed to the Area Control Centre (ACC) to relay to the pilot. No impact on operations.

June 16, 2022

Incident at SIOUX LOOKOUT ON (CYXL)

A Skycare Air Ambulance Israel 1124A (C-GIAW) from Sioux Lookout, ON (CYXL) to Sioux Lookout, ON (CYXL) declared an emergency due to dual flap failure. All agencies were notified and emergency services were dispatched. The pilot advised that the situation was under control and made an uneventful landing at 2334Z. No impact on operations.

June 20, 2022

Incident at NORTH SPIRIT LAKE ON (CKQ3)

A Wasaya Airways Beech 1900D (WSG1480) from Sioux Lookout, ON (CYXL) to North Spirit Lake, ON (CKQ3) conducted a missed approach due to a flap issue and returned to CYXL. No assistance required. No impact to operations.

June 17, 2022

Incident at SIOUX LOOKOUT ON (CYXL)

A Wasaya Airways Beech 1900D (C-FQWA/WSG1480) from Muskrat Dam, ON (CZMD) to Sioux Lookout, ON (CYXL) conducted a missed approach due to a flap indication. The pilot conducted maintenance checks prior to the second approach and landed safely at 2127Z. No impact on operations.

June 11, 2022

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

A WestJet Boeing 737-8CT (C-GWSZ/WJA1202) from Toronto/Lester B. Pearson, ON (CYYZ) to New York/LaGuardia, NY (KLGA) elected to return to CYYZ due to a stabilizer trim issue. WJA1202 did not declare an emergency and landed on Runway 24L at 1444Z without further incident (WOFI). No impact to operations.

May 28, 2022

Incident at In the vicinity of: TORONTO / BILLY BISHOP TORONTO CITY AIRPORT ON (CYTZ)

A Porter Airlines Inc. de Havilland DHC-8-402 (POE944) from Boston, MA (KBOS) to Toronto/Lester B. Pearson, ON (CYYZ) advised of flight control issues, no emergency declared and continued to destination. POE944 landed at 2210Z without further issues.

May 29, 2022

Incident at KITCHENER / WATERLOO ON (CYKF)

A Waterloo-Wellington Flying Club Cessna 152 (C-FGJK) from Kitchener/Waterloo, ON (CYKF) to Kitchener/Waterloo, ON (CYKF) reported a possible tail strike after a touch-and-go. The aircraft landed safely and taxied to the apron, damage is unknown. The runway was inspected, no operational impact.

May 20, 2022

Incident at SIOUX LOOKOUT ON (CYXL)

On final approach, a Wasaya Airways Beech 1900D (C-GWOX/WSG739) from Bearskin Lake, ON (CNE3) to Sioux Lookout, ON (CYXL) reported a possible flap issue and conducted a missed approach.

May 16, 2022

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

A WestJet Encore Ltd. Bombardier DHC-8-402 (C-GTWE/WEN3219) from Toronto/Lester B. Pearson, ON (CYYZ) to Thunder Bay, ON (CYQT) elected to return to CYYZ due to a flap issue. WEN3219 landed on Runway 23 at 0614Z after burning some fuel. No impact to operations.

April 29, 2022

Incident at KITCHENER / WATERLOO ON (CYKF)

A Waterloo-Wellington Flying Club Cessna 152 (C-GYAP) from Kitchener/Waterloo, ON (CYKF) to Kitchener/Waterloo, ON (CYKF) aborted its take-off and returned to the apron due to a possible tail strike.

May 5, 2022

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

A WestJet Boeing 737-700 (WJA2767) from Punta Cana, Dominican Republic (MDPC) to Toronto/Lester B. Pearson, ON (CYYZ) conducted a go-around for Runway 06R due to a flap issue. WJA2767 held while actioning a checklist, then requested equipment to stand-by (STBY) for landing. WJA2767 landed on Runway 05 at 0028Z without further incident (WOFI). No operational impact.

April 18, 2022

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

A Chartright Air Inc. Cessna 560 Citation Ultra (C-GVJT/HRT373) from Toronto/Lester B. Pearson, ON (CYYZ) to Orlando, FL (KORL) requested to return to CYYZ after departing from Runway 05 due to stuck flaps. No emergency was declared and HRT373 landed on Runway 05 at 1528Z without further incident (WOFI). No impact to operations.

April 6, 2022

Incident at 37NM THUNDER BAY ON (CYQT)

Shortly after departure, an Air Bravo Pilatus PC-12/45 (AB229) from Thunder Bay, ON (CYQT) to Thunder Bay, ON (CYQT) reported an elevator issue, declared an emergency, and returned to CYQT. Landed without incident or impact to operations at 1403Z. Aircraft Rescue and Fire Fighting (ARFF) unit responded.

March 25, 2022

Incident at 5025N / 09156W

A North Star Air Pilatus PC-12/47 (C-GXTB/BF704) departed Sioux Lookout, ON (CYXL) advised of an issue with the flaps. The pilot elected to return to CYXL, and landed without incident at 2020Z. No emergency and no impact to operations.

March 27, 2022

Incident at 4352N / 07828W

An Air Canada Boeing 787-9 (ACA56) from Toronto/Lester B. Pearson Intl, ON (CYYZ) to Dubai, UAE (OMDB) declared a PAN PAN shortly after departure due to surface control issues at approximately 0337Z. The aircraft elected to conduct fuel dump procedures and return to CYYZ where they landed without further incident at 0440Z. No reported operational impact.

March 2, 2022

Incident at THUNDER BAY ON (CYQT)

A foreign registered Pilatus PC-12 (HBFSN/PCH63) from Thunder Bay, ON (CYQT) to Broomfield/Rocky Mountain, CO (KBJC) reported a flap issue on departure off of Runway 25. PCH63 returned to land, no assistance required. No operational impact.

February 10, 2022

Incident at SIOUX LOOKOUT ON (CYXL)

Shortly after take-off, a Wasaya Airways Beech 1900D (WSG1475) from Sioux Lookout, ON (CYXL) to Angling Lake/Wapekeka, ON (CKB6) reported an issue with the aircrafts rudder boost system and elected to return to the field. The aircraft landed without incident or impact to operations at 1708Z. No assistance was required and the Aircraft Rescue and Fire Fighting (ARFF) unit did not respond.

February 3, 2022

Incident at THUNDER BAY ON (CYQT)

A Wasaya Airways Pilatus PC-12/45 (C-GZGZ/WSG511) from Thunder Bay, ON (CYQT) to Sioux Lookout, ON (CYXL) departed CYQT and reported their flaps were stuck and advised they were returning to CYQT. No assistance required, no impact to operations.

January 29, 2022

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

A Jazz Bombardier CL-600-2B19 (JZA7116) from Calgary, AB (CYYC) to Toronto/Lester B. Pearson, ON (CYYZ) declared "PAN PAN" at 2013Z due to flap issues. Aircraft Rescue and Fire Fighting (ARFF) unit was dispatched and the flight landed safely on Runway 05 at 2023Z. No operational impact.
UPDATE: TSB Report #A22O0012: C-FZJA, a MHI RJ Aviation CL600-2B19 (CRJ200) aircraft operated by Jazz Aviation, was conducting flight JZA7116 from Calgary International, AB (CYYC) to Toronto/Lester B. Pearson International, ON (CYYZ) with 3 crew and 16 passengers on board. While on approach into CYYZ for Runway 05, the flaps failed to extend when the flight crew actioned the lever to lower the flaps. The flight crew completed the applicable procedure of the Quick Reference Handbook (QRH), conducted a missed approach and declared "Pan Pan" with Air Traffic Control (ATC). The aircraft performed a second approach, with the flaps up, for Runway 05, where it landed without further incident with Airport Rescue and Fire Fighting (ARFF) vehicles standing by. The company maintenance inspected the system and found the brake and positioning sensing unit (BPSU) sensing the RH flaps position at 46.6 degrees and a full lock of the LH flaps. Maintenance adjusted the RH flaps with the BPSU to 45 degrees and replaced all four LH flap actuators. The applicable rigging was completed and the system tested serviceable.

January 28, 2022

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

A WestJet Boeing 737-800 (WJA2507) from Puerto Plata, Dominican Republic (MDPP) to Toronto/Lester B. Pearson, ON (CYYZ) conducted a go-around for Runway 06L due to a flap issue. The pilot then declared "PAN PAN" due to flight control issues. The aircraft landed without issue on Runway 05 around 2349Z. Emergency vehicles were dispatched. No operational impact.
UPDATE from Airworthiness: A Civil Aviation Safety Inspector (CASI) looked into this occurrence. The flight crew of WJA2507 from Puerto Plata, Dominican Republic (MDPP) to Toronto/Lester B. Pearson, ON (CYYZ) on January 28, 2022 reported on Log Page AM51564 that on final approach they selected "flaps 30" and the flaps stayed at 15 units. A go-around was conducted and the aircraft landed in the flap 15 configuration without incident. It was noted that, after landing, the flaps travelled to 30 units, with indication in the green and no asymmetry noted. WestJet (WJ) maintenance met the aircraft and performed a Built-in Test Equipment (BITE) check on the Flap Slat Electronic Unit (FSEU), and found no existing faults. The previous flight leg showed a Trailing Edge Left-Hand (L/H) sensor fail. A visual inspection of the L/H flap position sensor and connector was accomplished, with no defects noted. Further troubleshooting was conducted in accordance with the Boeing Fault Isolation Manual (FIM) 27-51 Task 813, with no faults found and the Flap Slat Electronics Unit (FSEU) still showing no existing faults, indicating that this was an intermittent defect. As due diligence, the L/H flap position transmitter and connector D275 were replaced and tested serviceable, in accordance with the Boeing Aircraft Maintenance Manual (AMM) and the Standard Wiring Practises Manual, and a Required Inspection Item (RII) inspection was accomplished. The aircraft was returned to service and has flown one leg with no recurrence of the defect. WJ Reliability was contacted to identify negative trends from all operators and to identify if there are any Original Equipment Manufacturer (OEM) remedies being reviewed, with the following results: this is a condition known to Boeing that affects all operators and the OEM is working on a permanent fix. Although the Fault Isolation Manual indicates that the operator may choose to replace the Flap Position Transmitter or the Indicator or both, new information from a Fleet Team Digest from Boeing that was created on 12/30/2021 suggests that the operator may want to consider replacing both the transmitter and the indicator. Even though there were no defects on the last flight, WestJet is replacing the Flap Position Indicator prior to further flight, per the suggestion in the new Boeing Fleet Team Digest (Work Order 690253).
UPDATE: TSB Report #A22O0011: C-GAWS, a Boeing 737-8CT operated by WestJet, was conducting flight WJA2507 from Puerto Plata/Gregorio Luperon International, Dominican Republic (MDPP) to Toronto/Lester B. Pearson International, ON (CYYZ) with 6 crew and 158 passengers on board. While on approach into CYYZ for Runway 06L, the flight crew selected the flaps to 30 but subsequently noticed the flaps stopped and remained at 15. The flight crew went through non-normal procedures, performed a go-around and declared "Pan Pan" with Air Traffic Control (ATC). The aircraft performed a second approach for Runway 05 with the flaps at 15, where it landed without further incident with Airport Rescue and Fire Fighting (ARFF) vehicles standing by. Company maintenance inspected the aircraft, replaced the Trailing Edge (TE) Flap transmitters, the left TE Flap position transmitter connector, and the Flap position indicator, and the system tested serviceable.

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