ASN Wikibase Occurrence # 59553
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| Date: | Monday 13 April 2009 |
| Time: | 15:10 |
| Type: |  Piper PA-28-140 Cherokee |
| Owner/operator: | Private |
| Registration: | N945RH |
| MSN: | 28-7225283 |
| Year of manufacture: | 1972 |
| Total airframe hrs: | 6052 hours |
| Engine model: | Lycoming O-320-E2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Togwotee Pass, Wyoming -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Converse County, WY (KDGW) |
| Idaho falls, ID (KIDA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was following a highway to the northwest at 10,000 feet mean sea level. He crossed the mountain pass between 700 and 1,000 feet above ground level climbing slowly. Once on the west side of the pass, approaching the base of some cliffs, they encountered a strong down draft and the airspeed dropped rapidly and the airplane started to descend. The pilot reports that he attempted to keep the airspeed at 85 knots and climb but, that the airplane continued to lose altitude. He checked the engine instruments and did not note any degradation of engine performance. The airplane continued to descend. The pilot executed a forced landing in approximately the center of the valley ahead of them. The pilot reported that there were no preimpact mechanical malfunctions or failures. Based on the temperature and pressure readings from the closest weather reporting station, the density altitude at the accident site was about 9,200 feet.
Probable Cause: The pilot's encounter with a windshear/downdraft that exceeded the climb performance capabilities of the airplane.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Apr-2009 22:39 | slowkid | Added |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 03-Dec-2017 13:37 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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