ASN Wikibase Occurrence # 355614
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| Date: | Saturday 5 July 1997 |
| Time: | 11:00 LT |
| Type: |  Piper PA-18-150 |
| Owner/operator: | Private |
| Registration: | N4249Z |
| MSN: | 18-8478 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 6990 hours |
| Engine model: | Lycoming O-320A2B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Big Creek, ID -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Yellow Pine, ID (3U2) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While circling the Mile Hi United States Forest Service emergency airstrip to look at another aircraft accident, the pilot encountered lee side winds (downdraft), lost altitude and 'wound up having to flare to land.' The pilot intended to coast upslope and southbound over the ridge on which the north/south strip is situated, and take off on the upwind side. When the aircraft reached the top of the ridge the aircraft encountered an upslope wind which yawed the aircraft right. The aircraft then became airborne, crossing the top of the ridge and impacting the left main landing gear which then collapsed. The pilot estimated the winds at the accident site as 130-140 degrees at 5 to 10 knots, and the temperature at 80 degrees Fahrenheit. The approximate density altitude based on that temperature and elevation was 8,700 feet.
Probable Cause: The pilot-in-command's inadequate terrain clearance and failure to maintain directional control. Also, the overload of the aircraft's left main landing gear strut assembly. Factors contributing to the accident were high density altitude conditions, downdrafts (associated with the lee side of mountain flying), and crosswinds.
Accident investigation:
 |
|
Sources:
NTSB SEA97LA163
History of this aircraft
Other occurrences involving this aircraft
| 25 July 2013 | N4249Z | Frank O Blomquist | 0 | Challis, Idaho | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 13:52 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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