ASN Wikibase Occurrence # 131595
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| Date: | Saturday 21 September 1991 |
| Time: | 08:30 LT |
| Type: |  Piper PA-25-235 Pawnee |
| Owner/operator: | Wallace Flying Service |
| Registration: | N7509Z |
| MSN: | PA25-3543 |
| Total airframe hrs: | 10700 hours |
| Engine model: | Lycoming O-540B2B5 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Brewton, AL -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Mc Cullough, AL |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE LEFT WING SEPARATED FROM THE AIRFRAME WHEN ONE OF THE TWO WING FRONT SPAR FITTING CLEVIS EARS FAILED. EXAMINATION OF THE FAILED COMPONENT UNCOVERED CORROSION BETWEEN THE SECTIONS MAKING UP THE WELDED CLEVIS EAR. THE ACCUMULATION OF CORROSION IS ATTRIBUTED TO CHEMICAL SPRAYED FROM THE AIRPLANE OVER A LONG PERIOD OF TIME. ADDITIONALLY, THERE WAS NO INSPECTION PROCEDURE SPECIFIED FOR THIS AREA OF THE WING FITTING. SUBSEQUENTLY, THE NTSB ISSUED A RECOMMENDATION REQUESTING AN INSPECTION PROCEDURE TO PREVENT THE FORMATION OF CORROSION BETWEEN THE LAYERS OF CLEVIS MATERIAL.
Probable Cause: THE INFLIGHT SEPARATION OF THE LEFT WING RESULTING FROM CORROSION OF THE WING FRONT SPAR FITTING ASSEMBLY. A FACTOR WAS INADEQUATE MAINTENANCE PROCEDURES.
Accident investigation:
 |
|
Sources:
NTSB ATL91LA178
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 11-Apr-2024 12:06 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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