ASN Wikibase Occurrence # 298888
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| Date: | Friday 9 June 2000 |
| Time: | 07:50 LT |
| Type: | Stewart S-51 |
| Owner/operator: | Frank Yamrick |
| Registration: | N51FY |
| MSN: | 001 |
| Total airframe hrs: | 150 hours |
| Engine model: | General Motors GM 350 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | FORTY FORT, Pennsylvania -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | FORTY FORT, PA (KWBW) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During takeoff, approximately 150 above the ground, the propeller reduction gearbox input shaft failed, and the airplane lost all power. The pilot performed a forced landing to a field where the airplane struck a fence. After reviewing the wreckage, the pilot stated that he machined his own shaft for the home built airplane. He stated that he machined the shaft too thin, and after about 150 hours of operation, it failed at its weakest point. The kit manufacturer stated that the production model shafts are larger, and used aviation splines, whereas the accident airplane had a smaller shaft that used automotive splines.
Probable Cause: The owner/builder's inadequate design, resulting in total failure of the reduction gear assembly accessory drive shaft.
Accident investigation:
 |
|
Sources:
NTSB NYC00LA156
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 23:54 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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