Incident at 25 NM W of Calgary, AB (Conflict - loss of separation)


1999-07-15: Hailstop 1, a Piper Cheyenne, was cloud seeding west of Calgary near 16,000 feet ASL. Glacier 808, a Beech 1900, departed Calgary initially northwest-bound, then had to deviate south for weather. In doing so, Glacier 808 came into close proximity with Hailstop 1. The controller tried to turn Glacier 808 to the right but the pilot was unable to comply due to the weather. By the time the controller had Hailstop 1 reverse course, the aircraft came within 2.5 miles and 200 feet of each other in an area where 3 miles or 1000 feet is required. OPI - ANS and Airspace UPDATE ANS reported that a Fact-Finding Board will be held concerning this occurrence.


CADORS Number 1999C0573
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-07-14 - 01:18
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, 25 NM W of Calgary, AB
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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