ASN Wikibase Occurrence # 223894
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| Date: | Thursday 11 April 2019 |
| Time: | 15:08 LT |
| Type: |  Piper PA-32-300 Cherokee Six E |
| Owner/operator: | Private |
| Registration: | N4466T |
| MSN: | 32-7240067 |
| Year of manufacture: | 1972 |
| Total airframe hrs: | 19991 hours |
| Engine model: | Lycoming IO-540 -K1A5 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | NE of Bethel, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Aniak Airport, AK (ANI/PANI) |
| Bethel Airport, AK (BET/PABE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, while in cruise flight, the engine lost partial power, then total power, and the propeller stopped turning.
During the subsequent off-airport forced landing on the tundra meadow, the main landing gear separated from the airplane, resulting in substantial damage to the right wing.
Examination of the engine revealed a crankshaft failure that was likely a result of fatigue cracking that emanated from the surface of the main journal.
The engine was overhauled at a certified repair station about 14 flight hours before the accident. The engine manufacturer overhaul manual stated that the crankshaft was to be inspected using a magnetic particle inspection procedure as part of the overhaul; however, the crankshaft was not inspected as part of the overhaul. It is likely that if the crankshaft had been inspected as indicated, the fatigue cracking would have been detected and corrected during overhaul.
Probable Cause: A total loss of engine power due to a fatigue failure of the crankshaft. A contributing factor was the inadequate inspection during the engine's last overhaul.
Accident investigation:
 |
|
Sources:
NTSB ANC19LA016
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=4466T
History of this aircraft
Other occurrences involving this aircraft
| 26 August 2006 | N4466T | Private | 0 | Fairbanks, Alaska | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Apr-2019 05:32 | Geno | Added |
| 12-Apr-2019 09:16 | Captain Adam | Updated [Narrative] |
| 12-Apr-2019 13:54 | RobertMB | Updated [Aircraft type, Registration, Cn, Operator, Nature, Departure airport, Destination airport, Source, Narrative] |
| 02-Jul-2022 09:20 | ASN Update Bot | Updated [Time, Other fatalities, Nature, Departure airport, Destination airport, Source, Damage, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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