Incident at 75 NE of Frobisher Bay, NWT (Conflict - loss of separation)


1997-07-17: There was an operating irregularity between N2688M and D-IRKO about 75 miles northeast of Iqaluit. D-IRKO was authorized to descend from FL 240 to 16,000 feet without vertical separation from N2688M having been assured. N2688M was at FL 190, opposite direction to D-IRKO, so D-IRKO was subsequently cleared to FL 200 to ensure proper spacing. UPDATE As D-IRKO was descending to 16,000 feet, the controller who was working the sub-unit North sector realized that the two a/c were in conflict when there was less that the required 5 miles separation. He checked with the controller who was working the sub-unit East sector to confirm D-IRKO's clearance through N2688M's altitude. The pilot of D-IRKO was immediately instructed to stop his descent at FL 200. It was determined that the data controller had mistakenly deleted the progression strip for N2688M, and consequently the sector controllers assumed there was no conflict between the a/c. There will be an internal fact finding board by NavCanada.


CADORS Number 1997C0444
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1997-07-14 - 14:13
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Northwest Territories, Canada, North America, Prairie and Northern Region, 75 NE of Frobisher Bay, NWT
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions
Events Conflict - loss of separation

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