ASN Wikibase Occurrence # 356600
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| Date: | Sunday 6 October 1996 |
| Time: | 22:30 LT |
| Type: |  Cessna 175B |
| Owner/operator: | Private |
| Registration: | N8171T |
| MSN: | 17556871 |
| Year of manufacture: | 1960 |
| Total airframe hrs: | 3311 hours |
| Engine model: | Continental GO-300-D |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mount Pleasant, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Idabel, OK (F62) |
| Mount Pleasant, TX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, during cruise flight at 5,000 feet MSL, he smelled oil burning. As engine RPM decreased, the oil pressure dropped toward zero. Subsequently, there was an 'explosion' and the engine seized. During the ensuing forced landing, the airplane impacted trees, and came to rest on the ground in a left wing down attitude. A 3 inch diameter hole was found in the crankcase above the #3 cylinder attach point and the #3 connecting rod was separated. During engine disassembly, one of the connecting rod cap bolts for the #3 cylinder was found destroyed. One of the nuts for the #3 connecting rod cap was found laying in the piston skirt, separated from its bolt. The exterior of the nut and its threads were undamaged to the naked eye. No loose cotter pins were found within the engine. All other connecting rod cap bolts were found attached and cotter pinned. The end cap of the #2 piston pin was missing. The inner surface of the #2 cylinder barrel exhibited longitudinal scoring in the direction of piston action, corresponding to the diameter of the piston pin. 1 day prior to the accident, oil was changed and metal particles were found on the oil screen.
Probable Cause: The total loss of engine power due to the #3 connecting rod separation resulting in engine seizure. Factors were the dark night and the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW97LA006
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 08:58 | ASN Update Bot | Added |
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