Incident at Regina, SK


1999-05-18: SGS 030, a Piper Cheyenne, was inbound to Regina from Meadow Lake and the crew was initially cleared to descend to 4,000 feet. MES 3611, a BAe 146, departed from Runway 31 for Minneapolis and was cleared to 5,000 feet on runway heading. The Arrival Controller then gave the crew of SGS 030 an amended clearance to descend to 7,000 feet with a heading of 120 degrees. The crew read back the clearance correctly. MES 3611 was radar identified, cleared to 6,000 feet and turned to a heading of 080 degrees. The Controller planned to use vertical separation until lateral separation was achieved. A loss of separation occurred when SGS 030 descended through the assigned altitude of 7,000 feet. Radar data analysis revealed that vertical separation was 400 feet when lateral separation was lost. Separation deteriorated to 100 feet vertically and 2.37 NM laterally, and 200 feet vertically when lateral separation was achieved. A review of the audio tapes indicated that the Controller received a correct readback by the crew of SGS 030 for the 7,000 foot restriction. OPI - Enforcement


CADORS Number 1999C0367
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-05-17 - 20:30
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Saskatchewan, Canada, North America, Prairie and Northern Region, Regina, SK
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator State
Make  Silhouette image of PIPER
Model PA31T
Year Built 1977
Engine Type Turbo prop
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number SGS 030
Flight Rule
CARS Subpart
Phase of Flight Descent
Damage Unknown
Fatalities 0
Injuries 0
Events Conflict - loss of separation

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