2003-04-04: WEW 731, a HS 748, was cleared down to 7,000 feet awaiting an approach at Prince Albert (YPA) from the north. TW 602, a Cessna 441, was a departure from YPA cleared to 6,000 feet going north. When the target for the departing flight was first seen on radar, it was descending from 6,600 feet. The crew confirmed that they had exceeded the cleared altitude but were returning to 6,000 feet. The ATC separation standard being used was procedural vertical separation until radar coverage could be established and procedural separation was lost when TW 602 climbed above the cleared altitude. When the Controller first observed the departing flight, the two aircraft were approximately 20 NM converging opposite direction. Vertical was re-established when the two aircraft were approximately 15 NM apart and converging.
2003-04-08: UPDATE TSB reported that an ATC operating irregularity occurred approximately 20 nautical miles north of Prince Albert, Saskatchewan. A West Wind Aviation HS 748, C-FQVE, was cleared down to 7,000 feet, anticipating an approach clearance to YPA from the north. A Transwest Airlines Cessna 441, C-GCTA, was cleared on departure to climb to 6,000 feet, flying north from YPA. The two aircraft were approximately 20 nautical miles apart, when the radar target for C-GCTA activated and indicated that C-GCTA was descending from 6,600 feet. The required vertical separation was re-established when C-GCTA reached 6,000 feet, and the two aircraft were approximately 15 nautical miles apart.


CADORS Number 2003C0425
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-04-04 - 00:10
Day or Night? Day-time
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Saskatchewan, Canada, North America, Prairie and Northern Region, 20 NM N of PRINCE ALBERT (GLASS FIELD) SK (CYPA)
TSB Occurrence Number A03C0082
TSB Class of Investigation Class 5
AOR Number 28487
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions

Aircraft Details (2 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GCTA | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada Canada
Occurrence Type Incident Incident
Owner TRANSWEST AIR LIMITED PARTNERSHIP, BY ITS GENERAL PARTNERS, 101008427 SASKA (TCHEWAN LTD. West Wind Aviation Limited Partnership, By Its General Partner, West Wind Management Ltd
Operator TRANSWEST AIR (12508) Commercial WEST WIND AVIATION LIMITED PARTNERSHIP (12644) Commercial
Make  Silhouette image of CESSNA
 Silhouette image of HAWKER SIDDELEY
Model 441 HS 748 SERIES 2B
Year Built 1980 1984
Engine Type Turbo prop Turbo prop
Engine Make  Silhouette image of GARRETT
Engine Model TPE331-10N
Gear Type Land Land
Private No No
Amateur Built No No
Flight Number TW 602
Flight Rule
CARS Subpart
Phase of Flight Climb Approach
Damage No Damage No Damage
Fatalities 0 0
Injuries 0 0
Events Conflict - loss of separation Conflict - loss of separation

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