ASN Wikibase Occurrence # 38792
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| Date: | Sunday 23 June 1996 |
| Time: | 20:27 LT |
| Type: |  Piper PA-23-250 Aztec |
| Owner/operator: | Mike Cornelius |
| Registration: | N6937Y |
| MSN: | 27-4294 |
| Total airframe hrs: | 3534 hours |
| Engine model: | Lycoming IO-540-C4B5 |
| Fatalities: | Fatalities: 5 / Occupants: 5 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Clanton, AL -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Lakeland, FL (KLAL) |
| Alabaster, AL (2A1) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During cruise flight at 6,000 feet, the pilot reported to air traffic control that he had an engine fire and needed to land immediately. Subsequently, the airplane's left wing separated in-flight, and the airplane crashed in an uncontrolled descent. An investigation revealed that the number six cylinder on the left engine had separated in-flight. Metallurgical examination of the cylinder revealed a fatigue fracture. The fatigue originated at a corrosion pit between the cylinder's cooling fins. There was evidence that fire erupted and spread to the left wing fuel tank, leading to separation of the wing. Also, heat streaking was noted on the left engine cowling and left horizontal stabilizer. Aircraft records showed that the engine had accumulated 1,682 hours of flight time since it was last overhauled on 5/19/75.
Probable Cause: corrosion pitting of the number six cylinder on the left engine, and subsequent fatigue fracture and separation of the cylinder, which led to an engine compartment fire, wing fire, and an in-flight separation of the left wing.
Accident investigation:
 |
|
Sources:
NTSB ATL96FA095
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 06:07 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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