Incident at Approx. 48N/50W (ATS operating irregularity)


1997-03-25: The Canadian Military C130 was eastbound at 50W and requested a clearance from FL210 to FL230. The aircraft was out of VHF range to Gander FSS so the MD11 passing 49N/50W at FL290 was relaying the message to Gander FSS on behalf of the C130. The MD11 told FSS about the request and the FSS advised this crew that the request was given to ATC and was waiting for a reply. Then the MD11 crew told the C130 crew "FL230 is fine" and the C130 climbed to FL230. Gander is filing an altitude deviation. TSB no involvement.


CADORS Number 1996A0109
Occurrence Type Incident
Reported By
Occurred At 1996-01-09 - 10:15
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Canada, Gander Oceanic, Atlantic Region, Approx. 48N/50W
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By
Categories ATM/CNS
Events ATS operating irregularity

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