ASN Wikibase Occurrence # 369378
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| Date: | Saturday 24 December 1988 |
| Time: | 13:50 LT |
| Type: |  Cessna 175 |
| Owner/operator: | Private |
| Registration: | N9373B |
| MSN: | 55173 |
| Total airframe hrs: | 2901 hours |
| Engine model: | CONTINENTAL GO-300A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Starke, FL -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Keystone Height, FL |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
FLT WAS 3 MILES EAST OF ARPT RETURNING TO LAND AT ALT OF APRX 2,000 FT, WHEN THE ENG QUIT. PLT WAS UNABLE TO RESTART & ELECTED TO LAND IN SMALL TREES AS A NEARBY HIGHWAY WAS CONGESTED. ACFT COLLIDED WITH TREES & FELL TO THE GROUND. EXAMINATION OF THE ENG REVEALED THE CRANKSHAFT FAILED AT THE REAR CRANKSHAFT CHEEK BETWEEN #1 & #2 CYLINDER CONNECTING RODS. METALLURGICAL EXAMINATION OF THE FAILED CRANKSHAFT REVEALED LOW & HIGH CYCLE FATIGUE. EVIDENCE INDICATED THAT THIS WAS CAUSED BY VIBRATIONS OF THE CRANKSHAFT DURING CONTACT OF THE THREE DYNAMIC COUNTERWEIGHTS TO THE ADJACENT CAMSHAFT LOBES. COUNTERWEIGHT CONTACT WAS CAUSED BY WORN COUNTERWEIGHT BUSHING. REVIEW OF THE ENG LOGBOOKS REVEALED A MAJOR OVERHAUL WAS PERFORMED IN 1969, APRX 793 HRS PRIOR TO THE FAILURE. THREE TOP OVERHAULS WERE PERFORMED. THE FIRST & SECOND PERFORMED AT ONE YEAR INTERVALS AFTER THE MAJOR. THE THIRD WAS PERFORMED 10 YEARS AFTER THE SECOND.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB MIA89LA058
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 13:57 | ASN Update Bot | Added |
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