ASN Wikibase Occurrence # 133793
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| Date: | Friday 17 July 1998 |
| Time: | 22:00 LT |
| Type: |  Piper PA-28-140 |
| Owner/operator: | Brandon T. Leary |
| Registration: | N1793J |
| MSN: | 28-24219 |
| Total airframe hrs: | 2905 hours |
| Engine model: | Lycoming O-320-D2A |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Bethel, AK -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Canyon Creek, AK |
| (KBET) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot experienced binding in the flaps during landing. Unable to find a problem, he decided to takeoff on his return flight. During initial climb, the manually operated flaps abruptly retracted. The pilot was unable to hold the flaps in the extended position to climb, and the airplane contacted trees located in the departure path. Investigation revealed that the flap position locking pin, part number 480-715 (59-040-187-1500), had fallen from its hole, but the retaining roll pin was still in place. The only way to remove this pin from the hole is to first remove the retaining pin, or fracture it in two pieces. The missing pin was not recovered, but a photograph shows a similar dimensioned pin lying below the flap handle assembly.
Probable Cause: The fracture of the flap handle position locking pin, which resulted in an uncommanded raising of the flaps during takeoff. A factor was the pilot's decision to takeoff with a suspected problem in the flap system.
Accident investigation:
 |
|
Sources:
NTSB ANC98LA101
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Apr-2024 19:00 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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