Incident at EDMONTON INTL AB (CYEG) (Conflict - loss of separation, ATS operating irregularity)


2001-09-07: UPDATE TSB reported that ACA 3943, an A320, was westbound to Edmonton at a cruise altitude of FL 350. A second A320, ACA 3958, had departed from Edmonton and was climbing eastbound to FL 370. The two aircraft were flying tracks that crossed west of Saskatoon. The Prince Albert Sector Controller's attention was diverted to activity at an adjacent workstation, and he did not initially detect a conflict between the two flights. The Controller saw the conflict just before the aircraft passed, but too late to prevent a loss of separation. The two aircraft passed with 1.4 NM horizontal spacing when ACA 3958 was climbing through FL 364 and ACA 3943 was level at FL 350. The separation standard in effect was 5 NM horizontally or 2000 feet vertically.
2001-09-10: UPDATE ANS and Airspace reported that NAV CANADA will convene a Fact Finding Board.
2001-08-30: ACA 3958, an A320, was climbing out from Edmonton for FL 370 on a flight to Toronto. At the same time, ACA 3943, another A320, was inbound to Edmonton from Toronto at FL 350. The two a/c passed with 1.35 NM lateral separation and 1,400 feet vertical separation.


CADORS Number 2001C1105
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2001-08-30 - 00:31
Day or Night? Day-time
Fatalities 0
Aerodrome ID CYEG
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, Vicinity of Edmonton
TSB Occurrence Number A01C0209
TSB Class of Investigation Class 5
AOR Number 17423
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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