En route, a United Airlines Boeing 787-9 (UAL807) from Washington/Dulles, VA (KIAD) to Beijing, China (ZBAA) reported a medical emergency on board (involving a passager) and asked to be vectored to KIAD. Coordination carried out. No impact.

An Embraer EMB-125XR (N12160/UCA4956) from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Washington-Dulles Intl, DC (KIAD) rejected its takeoff due to an oil pressure problem indication.

A Jazz Bombardier CL-600-2B19 (C-GJZZ/JZA8172) on a flight from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Washington-Dulles Intl, DC (KIAD) rejected two takeoffs due to an indication in the cockpit. The aircraft returned to the gate.

Although it had received and read back clearance to climb to FL230, a Jazz Bombardier CL-600-2B19 (C-GUJA/JZA8172) from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Washington/Dulles Intl, DC (KIAD) called Boston, MA (KBOS) on climb to FL280. No impact.

A United Airlines Boeing 757-200 (UAL127) on a flight from Dublin, Ireland (EIDW) to Washington-Dulles Intl, VA (KIAD) request diversion to Bangor, ME (KBGR) due to a mechanical issue. No emergency or impact on operations.

An Aviation Starlink Learjet 45 (C-GMSY) from Montreal/Trudeau, QC (CYUL) to Montreal/Mirabel, QC (CYMX) lined up and was instructed to prepare itself immediately for takeoff on Runway 24L. C-GMSY taxied slowly. Impact: a Mesa Airlines Bombardier CL-600-2C10 (series 700) (N516LR/ASH6170) from Washington-Dulles, VA (KIAD) to Montreal/Trudeau, QC (CYUL) had to conduct a go-around.

While inbound for Runway 24R, an Endeavor Air Bombardier CL-600-2D24 (EDV5503) from Minneapolis/St. Paul, MN (KMSP) to Montreal/Pierre Elliott Trudeau, QC (CYUL) did not turn at AGNAG towards TIDAS and maintained its heading. Impact: the separation between a Mesa Airlines Bombardier CL-600-2C10 (N513MJ/ASH6138) from Washington/Dulles, DC (KIAD) and EDV5503 was reduced to 2.6 NM and 400 ft, where 3 NM and 1 000 ft are required. No other impact on operations.
UPDATE TSB #A19Q0136: N902XS, an Endeavor Air Canadair CRJ900 (CL-600-2D24) (EDV5503) was flying IFR from Minneapolis—St. Paul/Wold-Chamberlain, MN, to Montreal/Pierre Elliott Trudeau International (CYUL), QC. During its approach to CYUL, the aircraft did not turn towards TIDAS after AGNAG, as prescribed, and instead continued on its course. Separation with N513MJ, a Mesa Airlines Canadair CRJ700 (CL-600-2C10) (ASH6138) flying from Washington-Dulles Intl (KIAD), Washington, DC, to CYUL was reduced to 2.6 NM horizontally and 400 feet vertically, whereas the required separation was 3 NM horizontally or 1,000 feet vertically.

On approach into Montreal/Pierre Elliott Trudeau, QC (CYUL), a Mesa Airlines Bombardier CL-600-2C10 (series 700) (ASH6170) from Washington Dulles (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) asked that police meet the aircraft due to an unruly passenger on board. Landed at 1842Z. No impact on operations.

A Mesa Airlines Bombardier CL-600-2C10 (Series 700) (N515MJ/ASH6294) from Montreal/Trudeau, QC (CYUL) to Washington-Dulles, VA (KIAD) rejected its takeoff. It took off at 0022Z. No impact.

A Jazz Bombardier CL-600-2B19 (series 200) (JZA8173) from Washington-Dulles, VA (KIAD) to Montreal/Trudeau, QC (CYUL) at 4 000 ft reported that there was a drone in sight at 4 300 ft, downwind. No impact on operations.

A Mesa Airlines Bombardier CL-600-2C10 (series 700) (ASH6259) from Washington-Dulles, VA (KIAD) to Montreal/Trudeau, QC (CYUL) was seen flying at a speed that was incompatible with traffic on approach for Runway 24R and that did not match the instruction given out by air traffic services (ATS) and read back by the aircraft. ATS instructed ASH6259 to conduct a go-around to avoid reducing separation to an inadequate level. No impact on operations.

A Bombardier CL-600-2C10 (series 700) (N508MJ/AH6259) from Washington-Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) decided to conduct a go-around due to a possible gear problem. The aircraft landed without incident on Runway 24R at 2343Z. No impact on operations.

A Boeing 777-300ER (N2136U/UAL58) from San Francisco, CA (KSFO) to Washington-Dulles, VA (KIAD) requested to divert due to an ill passenger, but the aircraft did not declare an emergency. No impact on operations.

A Jazz Bombardier CL-600 2B19 (Series 200) (JZA8172) from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Washington-Dulles Intl, VA (KIAD) returned to CYUL due to a pressurisation problem. No impact on operations.

A Mesa Airlines Bombardier CL-600-2C10 (series 700) (N508MJ/ASH6259) from Washington-Dulles, VA (KIAD) to Montreal/Trudeau, QC (CYUL) rejected its approach for Runway 24R, then declared an emergency due to a gear problem. ASH6259 landed without incident at 2343Z and taxied to the gate.
UPDATE: CADORS 2019Q0289 (AOR 244435-V1) was a duplicate of this occurrence and was deleted.
Update: TSB Report #A19Q0017: N508MJ, a Mesa Airlines Bombardier CL-600-2C10 CRJ700, was on instrument flight rules (IFR) flight ASH6259 from Washington-Dulles, VA (KIAD) to Montreal/Trudeau, QC (CYUL). During the approach for Runway 24R at CYUL, there was an anomaly with the landing gear. The flight crew conducted a pull-up and declared an emergency. The aircraft returned, landed without incident, and taxied to the gate.

An RCMP Air Services Branch Pilatus PC-12/47E (C-GMPO) from Montreal/St-Hubert, QC (CYHU) to Washington-Dulles International, VA (KIAD) climbed to 6000 feet when the aircraft was only cleared up to 5000 feet.

A Porter Airlines de Havilland DHC-8-402 (POE244) from Ottawa/Macdonald-Cartier, ON (CYOW) to Toronto/Billy Bishop, ON (CYTZ) had a nose wheel steering issue after landing and was slow to exit runway. A Porter Airlines de Havilland DHC-8-402 (POE726) from Washington/Dulles, VA (KIAD) to Toronto/Billy Bishop, ON (CYTZ) was instructed to go around and returned for landing without issue.

The crew of a Republic Airways Embraer ERJ 170-200LR (RPA3557) on a flight from Washington/Dulles Intl, VA (KIAD) to Toronto/Lester B. Pearson Intl, ON (CYYZ) initiated a go around Runway 06L due to an unstable approach. RPA3557 landed at 1434Z. No operational impact.

Between 2241Z and 2300Z there were 8 missed approaches due to wind shear including a Sky Regional Airlines Embraer ERJ 170-200 SU (C-FRQP/SKV7711) on a flight from Washington/Dulles Intl, DC (KIAD) to Toronto/Lester B. Pearson Intl, ON (CYYZ).

A Sky Regional Airlines Inc. Embraer ERJ 170-200 SU (C-FRQP/SKV7711) from Washington/Dulles, DC (KIAD) to Toronto/Lester. B Pearson, ON (CYYZ) advised they were carrying out a missed approach Runway 24L due to wind shear. Aircraft issued with a heading of 235 degrees and climb to 3000ft. Aircraft observed to take up a heading of approx 270 degrees. Pilot was subsequently instructed to fly heading 180 degrees. Aircraft observed to take up the heading but then started descending. When pilot was queried they advised they were dealing with some weather issues. SKV7711 then diverted to Cleveland, OH (KCLE).

A Mesa Airlines Bombardier CL-600-2C10 (N501MJ/ASH6197) on a flight from Toronto/Lester B. Pearson Intl, ON (CYYZ) to Washington/Dulles Intl, DC (KIAD) was observed to deviate from cleared route (RIGUS 2 DEP) after position DUSOM. The aircraft was tracking direct to PSB instead of via the transition i.e. DUSOM-RIGUS-MIKKY-PSB.

A Mesa Airlines Bombardier CL-600-2C10 (ASH6197) on a flight from Toronto/Lester B. Pearson Intl, ON (CYYZ) to Washington/Dulles Intl, DC (KIAD) on the RIGUS2 departure turned direct to PSB.

A Porter Airlines Inc. de Havilland DHC-8-402 (C-GKQI/POE727) from Toronto/Billy Bishop, ON (CYTZ) to Washington-Dulles, VA (KIAD) reported a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) from a Helicopter Company Inc. Robinson R44 II (C-GSTL) from Toronto/Billy Bishop, ON (CYTZ) to Toronto/Billy Bishop, ON (CYTZ) that had departed the apron earlier. No impact to operations.

A Sky Regional Airlines Embraer ERJ 170-200 SU (SKV7711) on a flight from Washington-Dulles Intl, VA (KIAD) to Toronto/Lester B. Pearson Intl, ON (CYYZ) reported a possible bird strike on landing Runway 24R. Nothing found during inspection. No impact to operations.

A Porter Airlines DHC-8-402 (C-GLQB/POE729) from Toronto/Billy Bishop, ON (CYTZ) to Washington/Dulles Intl, DC (KIAD) reported a green laser strike climbing through 3000 feet after departing Runway 08.

On departure, a Mesa Airlines Bombardier CL-600-2C10 (Series 700) (ASH6197) from Toronto/Lester B. Pearson, ON (CYYZ) to Washington-Dulles, VA (KIAD) was unable to retract the nose gear. ASH6197 declared an emergency and requested a return to CYYZ with emergency equipment on standby. ASH6197 accomplished their checklist and landed on Runway 15L uneventfully. Emergency vehicles met and escorted the flight to the gate. No operational impact.
Update TSB #A19O0108: N510MJ, the Mesa Airlines CL-600-2C10 (ASH6197) was on initial climb out from Lester B. Pearson Intl - Toronto (CYYZ) when the flight crew received a GEAR DISAGREE EICAS message and was unable to retract landing gear. The flight crew declared an emergency and returned to CYYZ and landed uneventfully with ARFF standing by. The operators maintenance placed the landing gear on MEL, pinned it in the down position, and the aircraft flew back to their maintenance facility in Washington Dulles Intl (KIAD) with landing gear extended.

An Air Georgian Limited Bombardier CL-600-2B19 (Series 100) (C-GZJA/GGN7370) from Toronto/Lester B. Pearson, ON (CYYZ) to Washington-Dulles, WA (KIAD) reported a possible bird strike after departing Runway 33R. An inspection vehicle was deployed and did not find any bird. No impact to operations.

A Mesa Airlines Bombardier CL-600-2C10 (N509MJ/ASH6271) on a flight from Washington/Dulles, VA (KIAD) to Toronto/Lester B. Pearson Intl, ON (CYYZ) was instructed to initiate a missed approach to CYYZ Runway 05 due to previous landing aircraft, an American corporately registered Piper PA-46-500TP (N929DA) on a flight from Caldwell, NJ (KCDW) to Toronto/Lester B. Pearson Intl, ON (CYYZ) still exiting the runway.

After landing, a Porter Airlines de Havilland DHC-8-400 (POE718) from Washington/Dulles (KIAD) to Toronto/Billy Bishop (CYTZ) reported getting a TCAS RA from an American, privately registered, Cessna 208B (N101CG) while they were descending for the airport. No action was taken and no impact to operations.

A Porter Airlines Inc. de Havilland DHC-8-402 (C-GLQL/POE727), from Toronto/Billy Bishop, ON (CYTZ) to Washington-Dulles, VA (KIAD), was passed helicopter traffic restricted north of the field and told to remain on tower frequency when being cleared for takeoff. When being switched to the terminal, POE727 said they had received a traffic alert and collision avoidance system (TCAS) climb.

An Air Georgian Limited Bombardier CL-600-2B19 (Series 100) (GGN7371) from Washington-Dulles, VA (KIAD) to Toronto/Pearson, ON (CYYZ) was cleared to taxi on a closed taxiway.

An Air Georgian Limited Bombardier CL-600-2B19 (Series 100) (GGN7370) from Toronto/Pearson, ON (CYYZ) to Washington-Dulles, VA (KIAD) aborted takeoff. As a result, a Delta Air Lines Inc. McDonnell Douglas MD 88 (DAL2259) from Atlanta, GA (KATL) to Toronto/Pearson, ON (CYYZ) was instructed to overshoot when GGN7307 could not vacate the runway in time.

A Mesa Airlines Inc. Bombardier CL-600-2C10 (Series 700) (N503MJ/ASH6142) from Washington-Dulles Int., VA (KIAD) to Ottawa/Macdonald-Cartier Int., ON (CYOW) declared a medical emergency due to an ill passenger on board. ASH6142 landed at 1438Z and requested an ambulance at the gate. No impact on operations.

An Air Georgian Limited Canadair CL-600-2B19 (Series 100) (C-FWRS/GGN7373) from Washington-Dulles Intl, VA (KIAD) to Toronto/Pearson Intl, ON (CYYZ), after hand-off from the Cleveland Air Route Traffic Control Centre (ZOB), did not make contact with the Toronto Centre (CZY) (Grimsby sector) until 25NM inside the airspace. The pilot reported they did not hear any change over instruction. ZOB reported they were unable to contact the aircraft for a frequency change instruction.

While enroute, the pilot of a United Airlines Inc. Boeing 767-300 (UAL959) from London/Heathrow, UK (EGLL) to Washington-Dulles Intl, VA (KIAD) reported mechanical issues and asked to be rerouted to Chicago/OHare Intl, IL (KORD). No emergency was declared. Coordination was carried out. No impact.

A Mesa Airlines Bombardier CL-600-2C10 (Series 700) (N521LR/ASH6271) from Washington-Dulles Intl, VA (KIAD) to Toronto/Pearson Intl, ON (CYYZ) reported wake turbulence following an Air Canada Boeing 737-8 (C-GEHY/ACA403) from Montreal/Trudeau Intl, QC (CYUL) to Toronto/Pearson Intl, ON (CYYZ). At the time of the report, ASH6271 was 5.2NM behind and 1100 feet above ACA403. No operational impact.

An Air Georgian Bombardier CL-600-2B19 (Series 100) (GGN7373) from Washington Dulles International, VA (KIAD) to Toronto/Pearson International, ON (CYYZ) was sent around for Runway 06L to ensure runway separation.

A Mesa Airlines, Inc. Embraer ERJ 170-200 LR (N86334/ASH6127) from Toronto/Pearson International, ON (CYYZ) to Washington-Dulles International, VA (KIAD) did not follow the published standard instrument departure (SID) RIGUS2. The controller contacted the flight and re-cleared. No operational impact.

A Mesa Airlines Inc. Bombardier CL-600-2C10 (N510MJ/ASH6196) from Washington-Dulles Intl, VA (KIAD) to Toronto/Pearson Intl, ON (CYYZ) was instructed to go-around for Runway 24R due to traffic on the runway, a Piedmont Airlines Inc. Embraer EMB-145LR (N630AE/PDT4931) from Toronto/Pearson Intl, ON (CYYZ) to Philadelphia Intl, PA (KPHL), being slow to depart. ASH6196 landed on Runway 24R at 2336Z without further incident. No operational impact.

A Porter Airlines de Havilland DHC-8-402 (POE726) from Washington-Dulles International, VA (KIAD) to Toronto/Billy Bishop, ON (CYTZ) indicated landing long and went around. POE726 returned for landing without incident. No impact to operations.

An Executive Jet Management Gulfstream GV (EJM694) on a flight from Montreal/St-Hubert, QC (CYHU) to Washington/Dulles Intl, DC (KIAD) was observed off course and when questioned advised that they were going BUGSY N0455F400. Flight Plan route was CYHU FAWNS BUGSY. No impact on operations.

TSB #A19F0098: C-FDJA, a Bombardier CL-600-2B19 CRJ200 aircraft operated by Jazz Aviation LP, was conducting flight JZA8172 from Montreal/Pierre Elliott Trudeau Intl (CYUL), QC to Washington/Dulles Intl (KIAD), VA with 4 crew members and 48 passengers on board. During the descent for the approach to Runway 1R into KIAD at 4000 feet ASL, the aircraft encountered a near miss with a drone. The device passed at less than a wingspan away to the right of the aircraft, and at the same altitude. The flight crew described it as a 4-blade drone. ATC was advised. There were no injuries, and the aircraft landed without further incident.

A Porter Airlines de Havilland DHC-8-402 (POE1724) from Washington-Dulles, VA (KIAD) to Toronto/Billy Bishop, ON (CYTZ) reported an intermittent emergency locator transmitter (ELT) in the Buffalo/Niagara, NY (KBUF) area. No operational impact.

An Air Georgian Ltd. Bombardier CL-600-2B19 (Series 100) (C-GZJA/GGN7370) from Toronto/Pearson, ON (CYYZ) to Washington-Dulles, VA (KIAD) returned to CYYZ due to a hydraulic issue. The aircraft landed safely on the second approach due to an Air Canada Rouge Airbus A319 (ROU1827) from Toronto/Pearson, ON (CYYZ) to Palm Springs, CA (KPSP) aborting its takeoff. GGN7370 landed safely at 1339Z. No impact to operations. Duplicate of AOR-246811-V2.

TSB Report #A19F0010: C-FWJF, a Bombardier CL-600-2B19 CRJ200 aircraft operated by Air Georgian, was conducting flight GGN7372 from Toronto/Lester B. Pearson Intl (CYYZ), ON to Washington/Dulles Intl (KIAD), VA with 3 crew members and 47 passengers on board. During the visual approach to Runway 19L approximately 7 nm from the runway, the flight crew received a TCAS TA. The flight crew was able to visually identify a Boeing 777 aircraft, lining up for a landing on Runway 19C. Subsequently, the flight crew received a TCAS RA to MONITOR VERTICAL SPEED. After concluding that there was no danger, the flight crew notified ATC and continued the approach without incident.

Soon after initial contact, the pilot of an Air France Airbus A330-200 (FGZCE/AFR027) from Washington-Dulles, VA (KIAD) to Paris/Charles De Gaulle, France (LFPG) declared a mechanical issue and requested to return to KIAD. They then declared an emergency and were given a direct routing to KIAD. AFR027 departed the area of responsibility (AOR) at 0411Z.

At 1430Z, a Saudi Arabian Airlines Boeing 777-300 (HZAK37/SVA035) from Jeddah/King Abdulaziz, Saudi Arabia (OEJN) to Washington/Dulles, VA (KIAD) reported a medical emergency and requested to divert to St. Johns, NL (CYYT). Flight was re-cleared as requested. Fuel dump was required. No impact to operations. Landed at 1509Z.

Multiple aircraft, including a Netjets Transportes Aereos Bombardier BD-700-1A10 (CSGLD/NJE5NV) on a flight from Paris/Le Bourget (LFPB) to Washington/Dulles Intl, VA (KIAD) were filed through the active CYD areas south of Halifax/Stanfield Intl, NS (CYHZ). This impacted controller workload by necessitating multiple reroutes.

A United Airlines Boeing 757-224 (N14107/UAL126) on a flight from Washington/Dulles Intl, VA (KIAD) to Dublin, Ireland (EIDW) requested a diversion to Boston Intl, MA (KBOS) due to possible fumes in cockpit. No emergency declared.

Crew of a Hungarian military Dassault Falcon 7X (HUAF608) from Washington-Dulles, VA (KIAD) to Budapest, Hungary (LHBP) advised hearing a large bang. Declared "PAN PAN" and diverted to Bangor, ME (KBGR). Exited Moncton (QM) airspace at 0125Z. No other traffic impacted.