ASN Wikibase Occurrence # 133779
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| Date: | Wednesday 4 March 1998 |
| Time: | 10:06 LT |
| Type: |  Cessna 150M |
| Owner/operator: | Eagle East Aviation |
| Registration: | N63387 |
| MSN: | 15077277 |
| Total airframe hrs: | 9143 hours |
| Engine model: | Continental O-200-A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Haverhill, MA -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Lawrence, MA (LWM |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
In level flight at 2,000 feet, the engine began running rough with an associated vibration. The CFI took control of the airplane and the vibration became stronger. After shutting down the engine, the CFI attempted to land on an abandoned runway. The airplane impacted trees approximately 100 feet beyond the departure end of the abandoned runway. Examination of the engine logbooks and discussions with the operator disclosed that the engine was 362 hours beyond Time Between Overhaul (TBO) and automotive fuel was utilized without a Supplemental Type Certificate. Disassembly of the engine revealed the number two cylinder's exhaust valve was fractured and the cylinder was cracked. An examination of the fractured exhaust valve by the Materials Laboratory Division of the National Transportation Safety Board revealed that the 'shank area immediately adjacent to the fracture was reduced in size, and the fracture features were indicative of bending overstress separation with no indications of pre-existing cracking.'
Probable Cause: A loss of engine power due to a fractured number two cylinder exhaust valve and cracked cylinder. Contributing factors were the operator's allowance of the time between engine overhaul to be exceeded and the trees.
Accident investigation:
 |
|
Sources:
NTSB IAD98LA034
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Apr-2024 14:23 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Accident report] |
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