ASN Wikibase Occurrence # 133875
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| Date: | Sunday 4 August 1996 |
| Time: | 14:00 LT |
| Type: |  Ayres S-2R-G5 |
| Owner/operator: | Holloway Air Service Inc |
| Registration: | N20GH |
| MSN: | G5-105 |
| Total airframe hrs: | 720 hours |
| Engine model: | Garrett TPE-331-5-252 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Start, LA -
 United States of America
|
| Phase: | Take off |
| Nature: | Agricultural |
| Departure airport: | (NONE) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, the engine began to lose power during the takeoff roll. He said he was 'past the stopping point' and was 'able to get the airplane to fly about 1/2 mile before the engine shut down completely.' A forced landing to a cotton field was initiated. After the aircraft came to a stop, it was consumed by a postimpact fire. A teardown of the Garrett TPE-331 turbine engine was performed. Examination revealed that the turbine scavenge pump oil supply line shield assembly had separated and worn through the oil supply line it surrounded. The engine oil filter was removed, and no oil was found in the oil filter housing. One pint of oil was drained from the engine oil tank. Visual inspection of the propeller revealed that it was in the feather position. Regarding the Garrett TPE-331 engine, if oil pressure is lost, the propeller will automatically go to the feather position, even if the engine continues to run. A witness stated that during the previous flight, smoke was observed coming from the exhaust area of the engine. Also, the pilot had reported problems with the airplane's engine.
Probable Cause: a leak in the turbine scavenge pump oil supply line, due to chafing of its separated shield assembly, which resulted in an oil leak, oil starvation, and activation of the propeller feathering system.
Accident investigation:
 |
|
Sources:
NTSB FTW96LA332
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 05:10 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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