Incident at In the vicinity of: CALGARY INTL AB (CYYC)

Summary

2015-04-17: TSB Update : A03W0020: A Cessna 402C, (Registered as C-FAFB) operating as FLZ712 was inbound to Calgary from the north at 8000 feet ASL on vectors. A Beechcraft King Air, E90 (Registered as C-FNCB) was also inbound to Calgary from the north in a descent to a cleared altitude of 9000 feet ASL. As C-FNCB approached 9000 feet the aircraft were separated by 3 miles on radar. C-FNCB continued in a non-cleared descent. When C-FNCB approached 8800 feet the controller questioned them about their altitude and gave them an altimeter check. The pilot acknowledged the clearance and continued in the descent below the cleared altitude. A loss of separation occurred when C-FNCB descended below 9000 ASL. The controller attempted to stop the descent and issued vectors in order to regain separation. The aircraft came within 1.28 miles and 300 feet vertically of each other. In this area, either 1000 feet vertical or 3 miles separation is required. Separation was regained when 3 miles radar separation was achieved, about 2 ½ minutes after the loss of separation occurred.
2003-02-03: ALZ 712, a Cessna 402, was inbound to Calgary from the north, level at 8,000 feet and on a vector. C-FNCB, a Beech King Air, was also inbound to Calgary from the north, was in descent cleared to 9,000 feet. When C-FNCB approached 9,000 feet, the two aircraft were separated by 3 miles radar. The crew of C-FNCB did not stop at their cleared altitude; instead they continued the descent. As they descended past 8,800 feet, the Controller questioned the crew about their altitude and gave them an altimeter check. The pilot acknowledged the clearance and continued to descend below the cleared altitude. The Controller then tried to halt the descent of C-FNCB and issued vectors and traffic information to both aircraft in an attempt to regain separation. A loss of separation occurred when C-FNCB descended below their cleared altitude of 9,000 feet. The aircraft came within 1.28 miles and 300 feet vertical from each other in an area that required either 1,000 feet vertical or 3 miles separation. Separation was regained when 3 miles radar separation was achieved about 2 1/2 minutes after the initial loss of separation.

Details


CADORS Number 2003C0148
Occurrence Type Incident
Reported By NAV CANADA, Transportation Safety Board of Canada
Occurred At 2003-02-01 - 03:09
Day or Night? Night-time
Fatalities 0
Injuries
Aerodrome ID
Aerodrome Name
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, In the vicinity of: CALGARY INTL AB (CYYC)
TSB Occurrence Number A03W0020
TSB Class of Investigation Class 5
AOR Number 27342
Reported By NAV CANADA, Transportation Safety Board of Canada
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions
Events



Aircraft Details (2 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Aeroplane
 Silhouette image of Aeroplane
Canadian Registration FAFB | Flightaware (Registration) | Flightaware (Tracking) | AvHerald FNCB | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada Canada
Occurrence Type Incident Incident
Owner Alta Flights Ltd. PENTASTAR TRANSPORTATION LTD.
Operator ALTA FLIGHTS LTD. (5160) Commercial PENTASTAR TRANSPORTATION (10494) Private
Make  Silhouette image of CESSNA
CESSNA
 Silhouette image of BEECH
BEECH
Model 402C E90
Year Built 1980 1978
Engine Type Turbo prop
Engine Make PRATT & WHITNEY
Engine Model  Silhouette image of PT6A-28
PT6A-28
Gear Type Land
Private No No
Amateur Built No No
Flight Number
Flight Rule
CARS Subpart
Phase of Flight Approach Descent
Damage No Damage No Damage
Fatalities 0 0
Injuries 0 0
Events Conflict - loss of separation Conflict - loss of separation

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