Incident at 112 NM NE of Lynn Lake, MB (Conflict - loss of separation, ATS operating irregularity)


2000-05-17: DLH 455, a B747-400, was enroute from Los Angeles to Frankfurt at FL 330 and near the airspace boundary between Edmonton and Winnipeg ACCs. The Winnipeg Sector Controller observed an uncorrelated (no data tag) target at FL 330 on a southeast track converging with DLH 455. The Controller had no traffic on his data board which corresponded to the uncorrelated target. He then asked the crew of DLH 455 if they were able higher and cleared the flight to FL 350. The Winnipeg Controller contacted Edmonton ACC to determine if they had southeast traffic at FL 330 approaching the airspace boundary and the Controller was informed that the target was FDX 88, an MD-11, enroute Anchorage to Newark. The Edmonton Controller then provided a radar handoff to Winnipeg. The two a/c passed within 16.49 NM of ech other on a crossing track before vertical separation was established. "Procedural" separation in this airspace is required until radar separation is established. TSB has been informed of the occurrence and NavCanada is doing an internal investigation. OPI - ANS and Airspace UPDATE ANS reported that NAVCANADA held a Fact Finding Board.


CADORS Number 1999C0392
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-05-25 - 02:15
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, 112 NM NE of Lynn Lake, MB
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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