Incident at GANDER INTL NL (CYQX) (Conflict - potential, Communication navigation surveillance/air traffic system, ATS operating irregularity)

Summary

2003-03-06: A Continental Airlines Boeing 757 was westbound via routing 48N 50W YYT to TUSKY at FL330. The aircraft had not been radar identified. A Lufthansa MD11 was eastbound via routing TUSKY direct 48N 50W at FL330 to expect FL350 for the oceanic crossing. Before the controller issued the climb clearance to the MD11 the communication frequency became unserviceable. All available means was used to contact both aircraft. Before ATC was successful in contacting one of these aircraft safety was not assured. TSB Investigating - More to Follow
2003-03-07: TSB - Update - A03H0001: Lufthansa airlines flight 8161 (DLH8161), an MD-11, was enroute from KJFK to EDDF via, in part, TUSKY intersection direct 48N 050W, at FL330. DLH8161 was expecting a clearance to climb to FL350 for the oceanic crossing. Continental airlines flight 65 (COA65), a Boeing 757-224, was enroute from LPPT to KEWR, via 48N 050W direct YYT direct TUSKY intersection, at FL330. At the time of the occurrence DLH8161 was radar identified, but COA 65 was not. Before the controller could issue the climb clearance to DLH8161, the ATC radio frequency became unserviceable. The two aircraft were approximately 100 nm apart at the time. The two aircraft flew to within 30 nm before radio contact was restored, first with COA65 and then with DLH8161. The controller descended COA65 to FL320, and climbed DLH8161 to FL350. The aircraft passed with 4 nm lateral and 3000 feet vertical spacing.

Details


CADORS Number 2003A0156
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-03-05 - 15:30
Day or Night? Day-time
Fatalities 0
Injuries
Aerodrome ID CYQX
Aerodrome Name GANDER INTL NL (CYQX)
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, Gander ACC - 48N 50W
TSB Occurrence Number A03H0001
TSB Class of Investigation Class 3
AOR Number 27977
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Conflict - potential,Communication navigation surveillance/air traffic system,ATS operating irregularity


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