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.

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.

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.

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.

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.

At 0452Z and less than 1NM Northeast of 59N040W, an Icelandair Boeing 767-300 (TFISO/ICE2B) from Washington-Dulles, VA (KIAD) to Keflavik, Iceland (BIKF) requested M082 due to a medical emergency. Aircraft was re-cleared as requested, proceeded to its destination, and exited Canadian airspace without incident at 0519Z. No impact to operations.

A Brussels Airlines Airbus A330-343 (OO-SFL/BEL515) from Brussels, Belgium (EBBR) to Washington-Dulles, VA (KIAD) sent a PAN PAN message and advised that they were offsetting course, descending from F380 to F275, and turning back to EBBR. Multiple pieces of traffic. Aircraft was re-cleared eastbound with no further impact to operations.

An Air India Boeing 777 (AIC104) from Washington-Dulles, WA (KIAD) to Birmingham, England (EGBB) had to dump fuel for an operational issue.

A United Airlines Boeing 777-200 (UAL951) from Brussels, Belgium (EBBR) to Washington-Dulles, VA (KIAD) reported a medical emergency. Requested diversion and fuel dump.

A Brussels Airlines Airbus A330-200 (BEL516) from Washington-Dulles, VA (KIAD) to Brussels, Belgium (EBBR) turned back to its departure aerodrome due to a lavatory issue. No impact to operations.

A United Airlines Boeing 767-400 (UAL42) from Washington-Dulles, VA (KIAD) to Rome–Fiumicino, Italy (LIRF) turned around back to Newark, NJ (KEWR) with a maintenance issue. No emergency, no impact on operations.

A British Airways Boeing 747 400 (BAW6W) from Washington-Dulles, VA (KIAD) to London, UK (EGLL) declared a medical emergency and requested diversion to Halifax/Stanfield, NS (CYHZ). No coordination assistance requested.

A United Airlines Boeing 777-200 (N221UA/UAL988) from Frankfurt, Germany (EDDF) to Washington-Dulles, VA (KIAD) entered the New York Oceanic airspace at F360, and F380 was the expected coordinated altitude. No impact to operations.

A British Airways Boeing 747-700 (BAW6W) from Washington-Dulles Intl, VA (KIAD) to London/Heathrow, UK (EGLL) reported an emergency locator transmitter (ELT) signal near TUSKY at FL370. There were no other aircraft in the vicinity that reported any ELT. The Joint Rescue Coordination Centre (JRCC) Halifax was contacted, and the officials were confident that the signal was an airborne ELT coming from Maine, United States.

An Omni Air International Boeing 767-316 (N495AX/OAE600) from Washington-Dulles International, VA (KIAD) to Bucharest, Romania (LRBS) reported hearing an emergency locator transmitter (ELT) signal at FL330. The signal lasted for 5 minutes. Details were passed to the Joint Rescue Coordination Centre (JRCC) Halifax.

The flight management system (FMS) of a Scandinavian Airlines System Airbus A330-300 (SAS925) from Copenhagen, Denmark (EKCH) to Washington-Dulles, VA (KIAD) indicated 5603/6546 4924/7437, while the Canadian Automated Air Traffic System (CAATS) displayed 5531/6640 MT REEDO. No impact on operations.

A Commutair/United Express Embraer EMB-145XR (N14204/UCA4981) from Washington-Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) conducted a go-around on Runway 06R due to a passenger who was standing. The aircraft landed at 2353Z. No impact on operations.

A Jazz Bombardier CL-600-2B19 (series 100) (C-FZJA/JZA8173) from Washington-Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL), which was on final for Runway 06R, was instructed by the tower to conduct a go-around because the preceding aircraft at departure was slow in initiating its takeoff. No other impact on operations.

While en route, an Icelandair EHF Boeing 757-200 (ICE1A) from Keflavík, Iceland (BIKF) to Washington-Dulles, VA (KIAD) reported a medical emergency involving a passenger on board and requested to divert to Quebec/Jean Lesage, QC (CYQB). Coordination carried out. ICE1A landed without incident at 2157Z. No impact on operations.

A Jazz RJ 200 Regional Jet (JZA8173) from Washington/Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) was instructed to overshoot Runway 24R due to a Dorval Aviation Cessna 172L (C-FHNO), which was still on the runway. The aircraft landed at 0029Z. No other impact on operations.

A Commutair/United Express Embraer EMB-145XR (UCA4977) from Washington-Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) at 3 000 ft had been cleared for an area navigation (RNAV) approach on Runway 24R, but the aircraft climbed to 3 700 ft due to turbulence. No impact on operations.

A Commutair/United Express Embraer EMB-145XR (UCA4981) from Washington-Dulles International, VA (KIAD) Montréal/Pierre Elliott Trudeau International, QC (CYUL) initiated a missed approach for Runway 24R because of wind shear. No impact on operations.

An Embraer EMB-145XR (N11194/UCA4981) from Washington/Dulles, DC (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) conducted a go-around due to its unstable approach. It was too high and too fast. No impact on operations.

Hydraulic fluid reported on the Runway 24L holding bay. Inspection conducted. The leak possibly came from a Bombardier CL-600-2B19 (Series 200) operated by Jazz (JZA8172), flying from Montreal/Pierre-Elliott-Trudeau Intl (CYUL), QC, to Washington-Dulles International (KIAD), VA. Pilot notified.

4 vehicles crossed Taxiway A4 while the lights were solid red. A Trans States Airlines Embraer EMB-145LR (LOF4712) from Washington/Dulles, DC (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) left Runway 24L on A4. No impact on operations.

A Trans States Airlines Embraer ERJ-145 (N839HK/LOF4604) from Washington/Dulles, VA (KIAD) to Montreal/Pierre Elliott Trudeau, QC (CYUL) reported having been targeted by a green or red laser near Olympic Stadium during its approach on Runway 24L.

A Royal Jordanian Boeing 787-8 (JYBAC/RJA270) from Montreal/Pierre Elliott Trudeau International, QC (CYUL) to Amman, Jordan (OJAI) requested a different heading during takeoff on Runway 24R due to weather conditions, after having been cleared to take off and before starting to move. Impact: a Jazz Bombardier CL-600-2B19 (C-GGJA/JZA8175) from Washington-Dulles Intl, VA (KIAD) to Montreal/Pierre Elliott Trudeau International, QC (CYUL) was instructed by the tower to conduct a go-around.

On short final for Runway 06L, a Cascades Piaggio P-180 AVANTI (C-FNGA) from Washington-Dulles, VA (KIAD) to Montreal/Saint-Hubert, QC (CYHU) conducted a go-around after a bird strike. C-FNGA then landed without incident. The runway was inspected from 2317Z to 2326Z. Impact on operations: 2 aircraft had to use Runway 24L.

A Trans States Airlines LLC Embraer EMB-145 (LOF4651) from Washington-Dulles, DC (KIAD) to Montreal, QC (CYUL) was cleared for 3 000 ft and correctly read it back. LOF4651 intercepted the final on Runway 24R at 1 700 ft. Impact on operations: noise-abatement procedures were not respected.