July 14, 2020


A Government Of Canada, Department Of National Defence McDonnell Douglas CF-18 Hornet (CLAW21) from Bagotville, QC (CYBG) to Bagotville, QC (CYBG), in formation with CLAW22, declared an in-flight emergency without specifying the reason. When questioned by air traffic services (ATS), CLAW21 said it coordinated directly with the military terminal control unit (MTCU) of Bagotville (BG). The aircraft landed at 2040Z. No impact on operations.

February 20, 2020


During the transfer from the military terminal control unit (MTCU) at Bagotville, QC (CYBG) to the Montreal air traffic service (ATS), a Pascan British Aerospace Jetstream 3212 (PSC999) from Bagotville, QC (CYBG) to Sept-Îles, QC (CYZV) was seen 4 000 ft higher than the altitude cleared and coordinated with the MTCU at CYBG. No impact on operations.

July 3, 2019

Incident at VANCOUVER CENTRE / ACC DE VANCOUVER (Communication navigation surveillance/air traffic system)

An American privately registered Beech 95-C55 from Port Alberni, BC (CBS8) to Seattle/King County, WA (KBFI) departed and subsequently entered Vancouver area control centre (ACC) airspace without proper coordination between Comox military terminal control unit (MTCU) and Vancouver ACC. As a result, separation was not assured. No operational impact.

August 15, 2018

Incident at 4853N / 12309W

An American corporately registered Piper PA-34-200T (N35727) from Bellingham, WA (KBLI) to Ketchikan, AK (PAKT) crossed trans-border into Canadian airspace without any flight plan and transited Vancouver and Victoria Class C airspace without making contact with air traffic control (ATC). Aircraft was contacted via Comox Military Terminal Control Unit (MTCU). No impact on operations.

February 28, 2018

Incident at 4919N / 12417W

A Government of Canada, Department of National Defence McDonnell Douglas CF-18 Hornet (ODIN21) from Comox, BC (CYQQ) to Comox, BC (CYQQ) entered Victoria Terminal airspace without appropriate coordination from Comox military terminal control unit (MTCU) resulting in increased air traffic control (ATC) workload and complexity.

June 18, 2018

Incident at WINNIPEG CENTRE / ACC DE WINNIPEG (Other operational incident, Communication navigation surveillance/air traffic system)

A Skyservice Business Aviation Beech B200 (C-GPNE) from Meadow Lake, SK (CYLJ) to Calgary Int'l, AB (CYYC) received an IFR clearance from the Cold Lake, AB (YOD) military terminal control unit (MTCU) while in the Winnipeg Area Control Centre (ACC) area of responsibility without prior approval from Winnipeg (WG) ACC.

November 28, 2017


A Government of Canada, Department of National Defence Lockheed C-130 (TSKR333) on a VFR flight from Greenwood, NS (CYZX) and landing at Greenwood, NS (CYZX) squawked an emergency code. Greenwood (ZX) military terminal control unit (MTCU) was contacted to authenticate the aircraft status. There was no emergency.

February 26, 2016


Aviation occurrence report #14219: The pilot of a privately owned Aeronca 7CCM took off within the Bagotville (CYBG), QC control zone without establishing radio contact with air traffic control (ATC). It climbed to 2000 feet, crossing the departure path (5 NM west of the airport) without contacting ATC. The pilot also did not contact Bagotville MTCU once established enroute. Upon checking with the flight information centre (FIC), it was determined that a flight plan had been filed, but not activated. The pilot was squawking the correct transponder code assigned by the FIC.

June 18, 2016

Incident at 30NM NW VANCOUVER INTL BC (CYVR) (Communication navigation surveillance/air traffic system)

A Pacific Coastal Airlines Beech 1900C (C-GPCY/PCO883) from Vancouver, BC (CYVR) to Bella Bella (Campbell Island), BC (CBBC) was handed off from Comox, BC (QQ) military terminal control unit (MTCU), checked in with Vancouver, BC (VR) Area Control Centre (ACC) climbing to FL200. A160 was the coordinated altitude, however the pilot appeared to have been issued instruction by QQ MTCU to climb to FL200. No operational impact.

February 15, 2016

Incident at In the vicinity of: GREENWOOD NS (CYZX)

The Pilot of the Department of National Defence Lockheed C-130 (Hercules) (TSKR332) from Greenwood, NS (CYZX) to Charlottetown, PE (CYYG) indicated they had one engine out and declared an emergency. Requested return to CYZX. 38000 lbs of fuel at time of declaration and 9 souls on board. Flight control was given to CYZX military terminal control unit (MTCU) at 1440Z.

August 25, 2014

Incident at ROBERVAL QC (CYRJ)

A Max Aviation Beech 100 (MAX190), from Roberval, QC (CYRJ), to St-Hubert, QC (CYHU), asked for IFR authorization. The area control centre (ACC) was waiting for approval from the military terminal control unit (MTCU) at Bagotville. MAX190 notified the flight service station (FSS) at Rouyn-Noranda, QC (CYUY), that it was going to conduct a VFR departure. The aircraft taxied without having received authorization. MAX190 received and read back the authorization while taking off. No impact on operations.
Update: According to information from the Commercial and Business Aviation Division, the error was due to the two pilots? poor understanding of the authorization received. The pilots interpreted the controller?s response as a VFR takeoff validation.

November 8, 2014

Incident at Active Pass, BC NDB (AP)

Approximately 5-7 minutes after a privately registered Cessna 172 from Boundary Bay, BC (CZBB) to Courtney Airpark, BC (CAH3) received routing instructions from air traffic control (ATC), the aircraft was unreachable and subsequently squawked 7600. Further attempts to determine if the aircraft was receiver only (RONLY) were unsuccessful and communication was never reestablished. The aircraft was last observed changing to a 1200 code as it crossed into Comox, BC (CYQQ) military terminal control unit (MTCU) airspace and co-ordination with CYQQ was done to continue to monitor the aircraft's progress. There was no operational impact. Aircraft landed safely at CAH3. No flight plan filed and no contact from pilot to explain reason for emergency code.

September 8, 2014

Incident at CAMPBELL RIVER BC (CYBL) (Aerodrome - visual aids)

Campbell River, BC (CYBL) aircraft radio control of aerodrome lighting (ARCAL) 122.0 out of service. Comox military terminal control unit (MTCU) and Central Mountain Air (YBL) office were notified. NOTAM was issued.

April 26, 2014

Incident at ILIPA intersection

A K.D. Air Corporation Piper PA-31 (KDC213) flew a route from Tofino, BC (CYAZ) to Qualicum Beach, BC (CAT4), other than the IFR route filed and issued by air traffic control (ATC) via Nanaimo flight service station (FSS). Aircraft deviation from filed route resulted in the VW controller initiating an unanticipated approval request (APREQ) for a route revision with Comox, BC (QQ) military terminal control unit (MTCU).

May 15, 2014

Incident at In the vicinity of: ESTEVAN REGIONAL SK (CYEN) (Communication navigation surveillance/air traffic system)

A Government of Canada, Department of Transport Beech C90A (C-FGXE/ TGO993) from Winnipeg, MB (CYWG) to Shaunavon, SK (CJC5) was operating at 16 000 feet on an IFR clearance on a route which would take the flight through Moose Jaw, SK (MJ) Military airspace for which prior coordination with MJ military terminal control unit (MTCU) had not been made by the Winnipeg area control centre (ACC) controller. No known aircraft in the vicinity. No impact to operations.
UPDATE Transport Canada Aircraft Services: The aircraft was cleared out of controlled airspace for an approach and the pilot was aware of, and ensured they did not enter this airspace during the approach even though the controller did not provide the appropriate coordination.

January 24, 2014


UPDATE: JRCC Daily SAR Summary for January 24 [T2014-00099]: (501982N 1053355W - CA60262 : MOOSE JAW AIR VICE MARSHAL C M MCEWEN). 406 personal locator beacons picked up by SARSAT. Moose Jaw contacted JRCC and advised that Harvard 156102 had crashed South of Moose Jaw airport. Both pilots ejected safely and both ?seatpack? ELTs activated and were turned off. Emergency vehicles arrived on scene and picked up the pilots. No further assistance required. Case closed.
Moose Jaw MTCU reported an aircraft accident involving a military aircraft, a Government of Canada, Department of National Defence Raytheon Aircraft Company CT-156 Harvard II (APCH11) conducting training within the Moose Jaw MTCA. Two POB. Minor injuries. No impact to NAV Canada operations.

May 13, 2014


A Government of Canada, Department of National Defence Lockheed C-130 (TSKR336) from Greenwood, NS (CYZX) to Sydney, NS (CYQY) advised controller of in-flight emergency (fuel leak) and requested to return to CYZX. Shift Manager (SM), joint rescue co-ordination centre (JRCC) and Greenwood, NS (CYZX) military terminal control unit (MTCU) were advised. Arrived, safely, at CYZX at 1618Z. No impact on operations.

December 3, 2013

Incident at 30 miles W VANCOUVER INTL BC (CYVR)

A Pacific Coastal Airlines Beech 1900 (PCO711) from Vancouver, BC (CYVR) to Comox, BC (CYQQ) was IFR and entered the airspace under the control of CYQQ military terminal control unit (MTCU) before a hand-off from Vancouver Terminal was initiated. There were no other aircraft involved and no operational impact.

July 19, 2013


A Convair F-102 Delta Dagger aircraft was southbound from Cold Lake, AB (CYOD) exited CYOD military terminal control unit (MTCU) at 12000' without ATC clearance. A Central Mountain Air Beech 1900D (GLR786) from Lloydminster, AB (CYLL) to Calgary, AB (CYYC) had a clearance to FL200 off CYLL at the time. No further impact on operations.

April 15, 2013

Incident at 23 miles NW of GREENWOOD NS (CYZX)

An Air Georgian Beech 1900D (GGN7333) from CYHZ to CYSJ descended into the Military Terminal Control Area (MTCA) without prior coordination between the YSJ controller and the Military Terminal Control Unit (MTCU) controller.

February 2, 2012


Emergency Locator Transmitter (ELT) was heard on 121.5 mhz for one second. Comox Military Terminal Control Unit (MTCU) has been advised.

October 6, 2011

Incident at SASKATOON / JOHN G. DIEFENBAKER INTL SK (CYXE) (ATS operating irregularity)

C-FTSU, an Alberta Central Airways DHC-6, was flight planned from Lac La Biche to Saskatoon at 7,000 feet. At 1306z, Cold Lake MTCU passed an estimate to the Winnipeg ACC controller indicating an altitude of 9,000 feet. The Winnipeg ACC controller accepted the estimate but did not update the altitude in the automated CAAT System. At 1339z, C-FTSU checked in with the Winnipeg ACC controller at 9,000 feet however the flight data strip still indicated 7,000 feet. There was no loss of separation.

May 9, 2010


A strange noise was heard at Campbell River (CYBL) on Frequency 121.5 intermittently between 2142Z - 2145Z. It was later confirmed by Rescue Coordination Centre (RCC) Victoria via phone to be a type of ELT. Comox Military Terminal Control Unit (MTCU) was advised. Check was made with local aircraft within the zone. Two pilots indicated ELT signal strength decreases and ends as they descend onto CYBL. Information was passed to the RCC.

March 3, 2010

Incident at Bagotville Area (Moncton ACC) (TCAS alert)

At approximately 15:28Z, ACA868, Boeing 767-300, enroute from Toronto (CYYZ) to London (EGLL) at 37,000 ft., reported that they had an aircraft on TCAS at the same flight level off their left side. After reviewing the radar tapes it appears that an F18 working in the Bagotville (CYBG) area left the airspace and proceeded toward ACA868. The aircraft in question was squawking code 0103 then squawked 1200 when leaving the Bagotville airspace proceeding directly toward the Air Canada flight. The target was lost on Radar shortly thereafter. The pilot and Bagotville MTCU were contacted and informed us the F18 (Alout55) proceeded from the military airspace doing a high altitude climb, 20,000 ft. per minute, and leveled off at 9,000 ft. then proceeded to Baie-Comeau (CYBC) for a VFR approach before returning. The TCAS alert may have been caused by the high rate of climb. The National Operations Centre (NOC) and NORAD/Sidecar were advised. Nil TSB.

September 20, 2009


PSC327, un Beech King Air exploité par Pascan Aviation, effectuait un vol selon les règles de vol aux instruments (IFR) depuis Bagotville (CYBG) à destination de Montréal/Trudeau (CYUL). Au transfert de l'unité militaire de contrôle terminal (MTCU) de Bagotville, l'appareil était attendu au niveau de vol 180. Au contact initial, l'équipage a avisé être en montée pour le niveau de vol 200. Aucun impact sur les opérations ATC.*** ** *** PSC327, a Beech King Air operated by Pascan Aviation, was conducting an instrument flight rules (IFR) flight from Bagotville (CYBG) to Montréal/Trudeau (CYUL). Upon transfer from the Bagotville military terminal control unit (MTCU), the aircraft was expected to be flying at FL 180. Upon initial contact, the crew reported that it was climbing to FL 200. ATC operations were unaffected.

August 1, 2009

Incident at Parksville (Boundary Comox MTCU & YZR FIR, YYJ Terminal) (Communication navigation surveillance/air traffic system, ATS operating irregularity)

Air Norterra Inc. Flight MPE9601, a Boeing B732 IFR Comox to Victoria, estimate was passed with an altitude of 9,000 ASL. Comox MTCU cleared the aircraft to 13,000 ASL. The revised altitude was not passed to Victoria Terminal.
UPDATE / Add Info from TSB: A09P0233 - The Air Norterra Boeing 737-200 aircraft, operating as MPE9601, took off from Comox for Victoria and was cleared to 9,000 feet. Before the aircraft was handed over to Victoria Terminal, Comox Military Terminal cleared MPE9601 to maintain 13,000 feet, but the revised altitude was not passed to Victoria Terminal. An operating irregularity occurred when the aircraft entered Victoria terminal's airspace at 13,000 feet and safety was not assured.

June 12, 2009

Incident at 5230N/10600W

NATO 11, a military E3 Sentry was en route from CFB Cold Lake to CFB Bagotville when the aircraft entered Class A airspace without an ATC clearance. The crew had been instructed by Cold Lake MTCU to obtain an IFR clearance via them at mission completion. The crew opted to proceed on course VFR at FL 350 rather than comply with Cold Lake's instructions. There was no conflicting traffic.

March 9, 2009


NCB 886, a Beech King Air C90 operated by North Cariboo Flying Service, was en route IFR from Conklin to Calgary when Edmonton Centre observed the aircraft on radar at 10,600 feet ASL within CYR 221. The CFB Cold Lake MTCU Controller confirmed that the area was active with CF-18s manoeuvering in the vicinity.

March 22, 2007


At 1441Z an American-registered corporate Cessna C501, on a IFR flight from Victoria to Anchorage, AK, departed on Victoria International Runway 09 on a Victoria Three DEP, which has instructions to climb to 3000' on runway heading and contact Victoria Terminal after passing 1,000'. The aircraft climbed to 3,000' on runway heading without contacting the Terminal. As the aircraft was heading for Whitby MTCU airspace, the controller coordinated with Whitby for a point out. At 1446Z and 17 miles from Victoria Airport, the controller was able to contact the pilot of the aircraft on frequency 121.5. The pilot was instructed to turn right two zero zero degrees, maintain 4,000' and to expedite climb for terrain. The pilot acknowledged, and the aircraft was observed climbing to 4,800' before finally leveling out at 4,000'. The aircraft continued on without further incident.

October 11, 2005

Incident at CHICOUTIMI / ST-HONORÉ QC (CYRC) (ATS operating irregularity)

The IFR flight plan for ASJ268, a Cessna 402 operated by Air Satellite, which was preparing to conduct an instrument flight rules (IFR) flight between Chicoutimi/St-Honoré (CYRC) and Rimouski (CYXK), had not been sent to the Chicoutimi/St-Honoré control tower by the flight plan office, as required. The flight plan for ASJ268 was received through the Bagotville (CYBG) military terminal control unit (MTCU). Impact: ASJ268 was delayed by two minutes.

September 18, 2005

Incident at 11 nm Sw of NANOO intersection (ATS operating irregularity)

Comox MTCU initiated a radar hand off to Victoria Terminal on an IFR aircraft at 9,000 feet, 4 NM west of the Victoria Terminal boundary and 2 NM north of the Vancouver West boundary. There had been no previous coordination or estimate passed with either sector. There was no conflicting traffic.

June 18, 2005


Comox MTCU advised at 1710z that Helijet Airways flight JBA552 a Beech 1900 enroute from Boeing Field to Campbell River reported a cracked windshield. The aircraft landed at Campbell River without further incident at 1747z

August 1, 2005

Incident at COLD LAKE (GROUP CPT. R.W. MCNAIR) CFB (ATS operating irregularity)

UPDATE ANS and Airspace reported that Nav Canada will take no action on this matter as it was a DND error.
C-GKJM, a Cessna 182, was on an IFR flight from La Ronge, SK (YVC) to Josephburg, AB and departed YVC at 1759Z. Winnipeg ACC passed an estimate to Cold Lake MTCU as the flight would pass through military airspace with Cold Lake's permission. Cold Lake was asked to confirm that they would forward the estimate to Edmonton ACC, to which they replied they would. The estimate was never passed to Edmonton ACC.

November 29, 2005

Incident at Vicinity of Confederation Bridge

C-FYPU, Piper PA28, enroute Summerside (CYSU) to Waterville (CCW3) VFR, lost communication and transponder return at 1900Z. Prime target observed consistent with track of C-FYPU. TGO998, BE90, St. Anthony (CYAY) to Moncton (CYQM), was vectored to the vicinity of the prime target. TGO998 cancelled IFR and descended when the PA28 was in sight. The PA28 did not seem to be in any difficulty. Greenwood MTCU was advised and contacted Waterville airport. C-FYPU landed at Waterville at 2010Z. Aircraft had a complete electrical failure. TSB Case Closed
TSB Update: A05A0153: While transiting VFR from Summerside to Waterville, the pilot of C-FYPU, a PA-28-140, was advised that Moncton ACC was not receiving his transponder. He then noticed that his radio transmissions were not being heard. Shortly afterwards the aircraft's electrical system failed. ATC diverted a Transport Canada Beech 90 to investigate. As C-FYPU was not in distress, it continued en route. Moncton ACC advised Greenwood and Waterville of the inbound aircraft. C-FYPU made an uneventful NORDO landing at Waterville. The electrical failure was caused by a broken field wire on the alternator.
Maintenance & Manufacturing Update: The pilot advised that maintenance staff found that the field wire on the alternator had separated allowing the battery to discharge and cause a complete electrical failure.

September 1, 2004

Incident at CAMPBELL RIVER BC (CYBL) (Alleged Canadian Aviation Regulations (CARs) infraction)

Central Mountain Air flight GLR342 a Beech 190 called FSS at Campbell River on MF. The assisting specialist responded and asked the aircraft to standby. The specialist was copying clearance from Comox MTCU on phone line for the Beech 190 who was taxiing for a runway 11 departure. C-GKNH a Parallel Aviation Cessna 172M then broadcasted ""to position and rolling"" and entered runway 29. The specialist finished copying the clearance, but did not read it back as required in order to advise the Cessna 172M that he needed an advisory before departure and before entering the runway. The Cessna 172M complied by vacating runway 29 and taxiing for runway 11. When the specialist advised Comox ATC of the Beech 190 departure time, he was told that he had not read back the clearance as required.

March 17, 2004


C-FGZQ, a Cessna 340, departed Estevan SK and the pilot requested an IFR clearance to Swift Current. The flight-planned route would have taken the a/c through the CFB Moose Jaw (YMJ) Military Terminal Ccontrol Unit (MTCU) and so the Winnipeg ACC Controller issued a clearance with an ammended route circumventing the MTCU. The pilot, after numerous attempts, had still not read back the correct routing portion when communications were lost due to poor frequency coverage. The pilot did deviate from his assigned route and transited the Moose Jaw Military Terminial Control Area. The flight's activity was co-ordinated with Moose Jaw TCU prior to penetration. The pilot later called ACC to report that his a/c was experiencing radio, GPS and autopilot problems.

February 5, 2002

Incident at GREENWOOD NS (CYZX) (Conflict - potential, Conflict - loss of separation, ATS operating irregularity)

Operating irregularity. At 2248Z the Moncton ACC (Digby Sector Controller) issued a clearance for CFC1624 (a P3) to LICZ via Greenwood direct to YQY flight planned route at 9000 ft. At 2307 the Moncton ACC issued a clearance via the Greenwood MTCU for C-GJDI (a DHC6) from Waterville airport (approximately 10 nm east of Greenwood) to Saint John airport, to maintain 3000 ft. The 3000 ft altitude was used to ensure sufficient separation with CFC1624 crossing track in airspace controlled by Moncton. Greenwood reported the departure of C-GJDI at 2312Z, confirming the coordinated altitude of 3000 ft. At 2316 the Greenwood controller advised Moncton that C-GJDI was cleared to 4000 ft in order to meet direction of flight rules. This now put C-GJDI within Moncton controlled airspace with no planned separation with CFC1624. TSB Evaluating
Unpdate since 2002/02/06 Nil TSB

July 16, 2001


Vancouver Arrival lost radio contact with the aircraft for over 40 miles while downwind R08L. The aircraft (FA20) entered a 4000 foot MVA in Comox MTCU airspace at 3000 feet. The aircraft eventually contacted Arrival and was climbed to the MVA and proceeded to CYVR without further incident. The pilot indicated he inadvertently left the arrival frequency.

January 22, 2000

Incident at Trenton MTCU (Fire/smoke (warning), ATM - operations)

The Trenton Military Terminal Control Unit (MTCU) was evacuated due to smoke. Operations returned at 1600Z. Adjoining agencies and CACO advised. Ops. impact -- minimal disruption due to VFR weather. NAV CANADA's Toronto Area Control Centre took over management of the Trenton airspace.

May 10, 1993

Incident at LAC LA BICHE


May 5, 1993

Incident at IQALUIT (ATS operating irregularity)