ASN Wikibase Occurrence # 362296
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| Date: | Saturday 20 March 1993 |
| Time: | 13:23 LT |
| Type: |  Piper PA-22 |
| Owner/operator: | Private |
| Registration: | N72999 |
| MSN: | 22-6507 |
| Year of manufacture: | 1958 |
| Total airframe hrs: | 3095 hours |
| Engine model: | LYCOMING O-320-A2B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Drift River, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Palmer, AK (AK01) |
| King Salmon, AK (AKN | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING THE PILOT'S FIRST ATTEMPT TO FLY THROUGH LAKE CLARK PASS, HE MISTAKENLY TURNED UP THE WRONG VALLEY. WHEN THE ALREADY POOR FLIGHT VISIBILITY CONTINUED TO DETERIORATE, HE BEGAN A 180 DEGREE TURN TO GET OUT OF THE VALLEY, DURING WHICH HE ENTERED WHITEOUT CONDITIONS. WHEN HE SAW MOUNTAINS ON BOTH SIDES, HE KNEW THAT HE HAD MISSED THE TURN OUT OF THE VALLEY. WITH NO DEPTH PERCEPTION ON WHICH TO ESTIMATE HIS ALTITUDE ABOVE THE GROUND, HE APPLIED FULL ENGINE POWER AND MAINTAINED THE BEST CLIMB ATTITUDE. VERY SOON AFTERWARD THE AIRPLANE COLLIDED WITH, AND NOSED OVER ON, A GLACIER. DURING THE PREFLIGHT WEATHER BRIEFING THE PILOT WAS TOLD THAT LAKE CLARK PASS WAS FORECAST TO BE MARGINAL VFR TO IFR.
Probable Cause: THE PILOTS INADVERTENT VFR FLIGHT INTO IMC CONDITIONS. FACTORS WERE THE RISING TERRAIN AND THE WHITEOUT CONDITIONS.
Accident investigation:
 |
|
Sources:
NTSB ANC93LA046
History of this aircraft
Other occurrences involving this aircraft
| 15 February 2017 | N72999 | Private | 0 | Ruby, AK | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 19:52 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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