ASN Wikibase Occurrence # 353622
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| Date: | Thursday 29 October 1998 |
| Time: | 11:00 LT |
| Type: |  Grumman American AA-5A Cheetah |
| Owner/operator: | Private |
| Registration: | N9956U |
| MSN: | AA5A-0356 |
| Total airframe hrs: | 1463 hours |
| Engine model: | Lycoming O-320-E2G |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Scott, AR -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Greenville, MS (KGLH) |
| Little Rock, AR (KLIT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Following a total loss of engine power during the en route descent to the destination airport, the aircraft landed short of the runway. During the landing flare, the airplane stalled, bounced, landed on the main landing gear and nosed over. The aircraft had flown 852 hours since the last engine overhaul and 13 hours since the last annual inspection. Examination of the engine revealed a lack of gear train continuity. Disassembly of the engine accessory case revealed that the crankshaft gear lockplate was not installed and the crankshaft gear retaining bolt had backed out of the crankshaft approximately 1 3/4 turns. The crankshaft gear alignment dowel was fractured. Review of maintenance records indicated the engine was last overhauled in January 1987 and return to service by a FAA certified mechanic.
Probable Cause: The disengagement of the crankshaft gear due to the maintenance personnel not installing the gear lockplate at the last engine overhaul, resulting in the loosening of the gear retaining bolt, and the subsequent fracture of the gear alignment dowel. A factor was the pilot's inadvertent stalling of the aircraft during the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW99LA017
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 08:47 | ASN Update Bot | Added |
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