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ASN Wikibase Occurrence # 59553
Last updated: 27 July 2021
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Date:13-APR-2009
Time:15:10
Type:Silhouette image of generic P28A model; specific model in this crash may look slightly different
Piper PA-28-140 Cherokee
Owner/operator:Private
Registration: N945RH
MSN: 28-7225283
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)
Destination airport:Idaho falls, ID (KIDA)
Investigating agency: NTSB
Narrative:
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.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20090414X14441&key=1

Location


Revision history:

Date/timeContributorUpdates
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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