ASN Aircraft accident Beechcraft 100 King Air C-GNAA Island Lake, MB (CYIV)
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Status:Accident investigation report completed and information captured
Date:Friday 16 January 2009
Type:Silhouette image of generic BE10 model; specific model in this crash may look slightly different
Beechcraft 100 King Air
Operator:SkyNorth Air
Registration: C-GNAA
MSN: B-24
First flight: 1969
Engines: 2 Pratt & Whitney Canada PT6A-28
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Aircraft fate: Written off (damaged beyond repair)
Location:Island Lake, MB (CYIV) (   Canada)
Phase: Approach (APR)
Departure airport:Thompson Airport, MB (YTH/CYTH), Canada
Destination airport:Island Lake/Garden Hill Airport, MB (YIV/CYIV), Canada
The crew of a Skynorth Air Ltd Beech 100 was on a re-positioning flight from Thompson, MB, to Island Lake. On arrival in the Island Lake area, the crew commenced an instrument approach to runway 12. During the approach, the aircraft descended and the crew carried out a missed approach. During the missed approach, the aircraft struck a tree. The crew continued the missed approach and returned for a landing at Island Lake without further incident. No injuries were reported. The aircraft sustained damage to the wing leading edge and underside, and to its landing gear doors.

Probable Cause:

1. The crew conducted an Area Navigation (RNAV) approach for which they were not trained, with an aircraft that was not properly equipped nor approved for such purpose.
2. The aircraft descended 300 feet below the minimum descent altitude (MDA) as a result of a number of lapses, errors and adaptations which, when combined, resulted in the mismanaged approach.
3. The aural warning on the aircraft's altitude alerter had been silenced prior to the approach, which precluded it from alerting the crew when the aircraft descended below minimum descent altitude.
4. The SkyNorth standard operating procedures for conducting a non-precision approach were not followed, which resulted in the aircraft descending below the minimum descent altitude. During the ensuing missed approach, the aircraft struck trees.

Accident investigation:

Investigating agency: TSB Canada
Status: Investigation completed
Duration: 1 year and 6 months
Accident number: A09C0012
Download report: Final report


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This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Thompson Airport, MB to Island Lake/Garden Hill Airport, MB as the crow flies is 296 km (185 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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