ASN Wikibase Occurrence # 368939
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| Date: | Thursday 13 April 1989 |
| Time: | 06:15 LT |
| Type: |  Grumman AA-5B |
| Owner/operator: | Wra, Inc |
| Registration: | N28990 |
| MSN: | AA5B-0925 |
| Total airframe hrs: | 2481 hours |
| Engine model: | LYCOMING O-360-A4K |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Siler City, NC -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Charlotte, NC (KCLT) |
| Raleigh, NC (KRDU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE IN CRUISE FLT THE ENGINE QUIT WITH A LOUD CLUNK. A FORCED LANDING WAS ATTEMPTED ON A HIGHWAY. THE ACFT DID NOT MAKE THE ROAD AND IT HIT AN EMBANKMENT. EXAM OF THE ENGINE REVEALED A BROKEN CRANKSHAFT AT THE FILLET BETWEEN THE NUMBER 4 CRANKPIN & THROW. THE NUMBER 4 CONNECTING ROD SHOWED EVIDENCE OF OVERHEATING. CRANKSHAFT END PLAY WAS FOUND TO BE ONE HALF INCH AT THE ACCESSORY END. ENGINE HAD RECEIVED MAJOR OVERHAUL 81 HOURS PRIOR TO THE FAILURE OF THE CRANKSHAFT.
Probable Cause: IMPROPER ENGINE OVERHAUL PROCEDURES WHICH RESULTED IN THE CATASTROPHIC FAILURE OF THE ENGINE CRANKSHAFT. CONTRIBUTING TO THE ACCIDENT WAS THE LACK OF A SUITABLE FORCED LANDING AREA.
Accident investigation:
 |
|
Sources:
NTSB ATL89LA126
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 09:08 | ASN Update Bot | Added |
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