Incident at North Atlantic Ocean (Conflict - loss of separation, ATS operating irregularity)


2001-05-31: Update May 31, 2001 to reflect incident occurring in Domestic Airspace.
2001-05-30: TSB Update may 29, 2001. A01A0055: A Continental Airlines Boeing 767-400, call-sign COA 18, was at FL350 routing TUSKY - VIXUN 49N/50W. Delta Airlines Boeing 767-300, call-sign DAL 133 was at FL330 routing VIXUN - TUSKY 49N/50W. At Approximately 50 NM west of 49/50 DAL 133 was issued a climb clearance from FL330 to FL350. DAL133 initiated the climb and then queried the clearance when opposite traffic was observed passing overhead. At the time of passage, separation was not assured. ANS $ Airspace Update May 29, 2001. Nav Canada will conduct and OSI
2001-05-29: COA18 B767 FL350 ROUTING TUSKY -> VIXUN -> 49/50 DAL133 FL330 ROUTING 49/50 -> VIXUN -> TUSKY At approximately 1629z, prior to aircraft passage, DAL133 was issued a climb clearance from FL330 to FL350. At that time , both aircraft were approximately 3 miles to meet point. DAL133 queried ATC clearance when traffic observed passing overhead at FL350. Both Aircraft RVSM certified requiring only 1000 feet vertical separation, and although DAL133 had just commenced climb from FL33.1 at time of passage, separation was not assured for a period of time. TSB Evaluating.


CADORS Number 2001A0309
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2001-05-27 - 16:29
Day or Night? Day-time
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, North Atlantic Ocean
TSB Occurrence Number A01A0055
TSB Class of Investigation Class 5
AOR Number 15463
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Conflict - loss of separation,ATS operating irregularity

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