Incident at Gander Domestic (Conflict - loss of separation, ATS operating irregularity)


1996-08-23: Aircraft: G-BNWM B767 BAW197 Aircraft: G-BEMB DC-10 BAW227 The B767 was at FL280 on a flight from London to Charlotte/Douglas International Airport, routing in part 51N/50W direct CYMON. The DC-10 was at FL350 from London to Atlanta, routing in part 51N/50W direct CYMON. The B767 was operating directly below the DC-10. The B767 was offered a radar vector to facilitate a climb to FL370 which the pilot accepted. Once radar spacing of 5.5 miles had been acheived the controller gave the B767 a near parallel heading to the DC-10's heading. (B767 H265 & DC-10 H270). The controller responded to other controller related duties and did not initally notice that the B767 had turned toward the other aircraft. When the problem was detected radar separation had eroded to 3.5 miles, immediate action was taken and the B767 was turned south. Later when queried the B767 crew said that they had flown a true heading instead of a magnetic heading. TSB case closed.


CADORS Number 1996A0785
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1996-08-23 - 14:56
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Gander Oceanic, Atlantic Region, Gander Domestic
TSB Occurrence Number
TSB Class of Investigation
AOR Number
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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