Incident at Gander Oceanic (ATS operating irregularity)

Summary

2003-04-30: TSB update:A03A0049: GTI604, a Boeing 747-400 aircraft was eastbound at FL330 estimating 50N/50W at 2203 UTC, Gander next (non-radar identified). GCO16, an MD-11 aircraft was west bound at FL330 with a routing of Gander, estimating 50N/50W at 2210 UTC (radar identified). When GCO16 progressed by Gander, the Gander High level controller instructed the aircraft to switch over to the Gander International Flight Service Station (IFSS) frequency. A short time later, the controller detected the conflict with GTI604 and asked Gander IFSS to have the aircraft return to his frequency. Once he was in contact with GCO16 again, he gave radar vectors around the approaching traffic (the two aircraft were approximately 125 miles apart at this time). About the same time as radar vectors were given to GCO16. GTI604 appeared on the controller's radar monitor so the controller asked Gander IFSS to have the aircraft switch to his frequency. Once the controller was in contact with GTI604, he radar identified the aircraft and gave radar vectors around the approaching traffic. When the two aircraft were abeam each other, they had approximately 35 miles of lateral separation and were both radar identified. Nav Canada has indicated that they will be enhancing the co-ordination procedures between controllers and planers as well as looking at placing a special mark on the data strips to indicated opposite direction traffic.
2003-04-28: Giant Airlines B747 GTI604 was westbound enroute from Luxembourg to Huntsville at FL 330 estimating 50N 50W at 2203Z. Gemini Airlines MD11 GCO16 was eastbound enroute from Kennedy to Brussels at FL330 estimating 50N 50W at 2210Z. The MD11 contacted Gander ACC and was given a Radar vector around the other traffic. Safety was not assured until this vector was issued to the aircraft.

Details


CADORS Number 2003A0241
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-04-26 - 21:55
Day or Night? Day-time
Fatalities 0
Injuries
Aerodrome ID
Aerodrome Name
Geographic Location Canada, Gander Oceanic, Atlantic Region, Gander Oceanic
TSB Occurrence Number A03A0049
TSB Class of Investigation Class 5
AOR Number 28882
Reported By NAV CANADA
Categories ATM/CNS
Events ATS operating irregularity


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