ASN Wikibase Occurrence # 150710
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| Date: | Thursday 15 November 2012 |
| Time: | 07:00 |
| Type: |  American Aviation AA-1 Yankee |
| Owner/operator: | Private |
| Registration: | N5642L |
| MSN: | AA1-0042 |
| Year of manufacture: | 1968 |
| Total airframe hrs: | 4098 hours |
| Engine model: | Lycoming O-320 SERIES |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | near Morgan County Airport, UT -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Morgan, UT (42U) |
| Logan-Cache Airport, UT (LGU/KLGU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A witness reported that the airplane took off just before sunrise and that the engine sounded normal. During climbout, the airplane impacted rising terrain about 3 miles from the airport and about 776 feet above field elevation. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. A review of the recorded meteorological data showed that the weather conditions were conducive to frost formation. Further, a witness at the airport reported observing frost on the surfaces of parked airplanes on the day of the accident. Therefore, it is likely that the airplane had frost on its surfaces before takeoff and that the pilot failed to adequately clear the frost off the airplane during the preflight inspection, which increased drag and reduced the production of lift; therefore, the airplane was unable to gain sufficient altitude to clear the rising terrain.
N5642L cancelled Apr 2015.
Probable Cause: The pilot's inadequate preflight inspection, which resulted in frost remaining on the airplane's surfaces and led to its inability to produce enough lift to clear rising terrain.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Nov-2012 01:35 | gerard57 | Added |
| 16-Nov-2012 05:22 | RobertMB | Updated [Aircraft type, Registration, Cn, Location, Narrative] |
| 16-Nov-2012 11:41 | Geno | Updated [Destination airport, Source] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 28-Nov-2017 13:55 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
| 02-Jul-2022 11:26 | rvargast17 | Updated [Damage, Narrative] |
| 12-Sep-2023 07:47 | Ron Averes | Updated [[Damage, Narrative]] |
Corrections or additions? ... Edit this accident description
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