Incident at Thompson, MB (Conflict - potential)


1997-09-25: Both a/c were inbound to Thompson, with their arrival times estimated to be 4 minutes apart. It was reported that SGK 911 arrived later than anticipated, which resulted in a potential conflict with CAV 1583. The two a/c ended up on converging headings near the airport, and CAV 1583 subsequently took evasive action by doing a 270 degree turn. UPDATE SKG 911 was inbound IFR to Thompson from Winnipeg with 3 people on board, while CAV 1583 was VFR to Thompson from York Landing with 2 crew. The crew of CAV 1583 called Thompson FSS at 2309Z with an ETA on Runway 23 of 2313Z. SGK 911 had received a non-specific IFR clearance for an approach at Thompson and the crew called FSS at 2306Z from 23 NM south of the airport, indicating they would be making an approach to Runway 23. At 2312Z, SKG 911 reported 4.6 DME on the 110 degree radial, and at 2313Z reported on the 080 degree radial and 3.6 DME. The crew of SKG 911 did not indicate that they were cancelling IFR or whether they were going to do a visual approach. At 2313Z, CAV 1583 reported established on a 5 mile final for Runway 23, and one minute later, SKG 911 reported established on final as well. The crew of CAV 1583 had SKG 911 in sight and performed a 270 degree turn for spacing. The published procedure for a VFR approach to Runway 23 incorporates a right hand circuit pattern. Radar data shows that the two a/c came within .2 NM laterally when SKG 911 was on left base and CAV 1583 began the turn for spacing. Vertical separation was estimated to be about 300 to 400 feet.


CADORS Number 1997C0650
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1997-09-19 - 23:14
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, Thompson, MB
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 - potential

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