ASN Wikibase Occurrence # 367857
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| Date: | Thursday 12 October 1989 |
| Time: | 16:00 LT |
| Type: |  Piper PA-28-140 |
| Owner/operator: | Private |
| Registration: | N6636W |
| MSN: | 28-20735 |
| Year of manufacture: | 1965 |
| Total airframe hrs: | 1861 hours |
| Engine model: | LYCOMING O-320-E2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Henderson, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Jacksonville, TX (JSO |
| Longview, TX (KGGG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRPLANE EXPERIENCED A HARD LANDING AFTER AN ENGINE FAILURE IN CRUISE FLIGHT AND THE ENSUING FORCED LANDING IN ROUGH TERRAIN. THE ENGINE FAILURE WAS DETERMINED TO BE THE RESULT OF THE FAILURE OF THE #3 EXHAUST VALVE. HOWEVER, THE ROOT CAUSE OF THE VALVE FAILURE COULD NOT BE DETERMINED METALLURGICALLY DUE TO SECONDARY DAMAGE TO ALL OF THE FRACTURE SURFACES. THE PILOT HAD RECENTLY PURCHASED THE AIRPLANE AND THE ENGINE WAS 661 HOURS PAST THE RECOMMENDED OVERHAUL TIME. A SERVICE INSTRUCTION CRITICAL TO THE REPLACEMENT OF THE EXISTING VALVES WITH HEAVIER DUTY VALVES HAD NOT BEEN COMPLIED WITH PRIOR TO THE SALE OR THE ACCIDENT. THE PURCHASER WAS NOT AWARE OF THE SERVICE INSTRUCTION.
Probable Cause: THE LOSS OF ENGINE POWER AS A RESULT OF A FAILURE OF THE NUMBER 3 EXHAUST VALVE DUE TO UNDETERMINED REASONS. FACTORS INVOLVED IN THE ACCIDENT WERE THE PREVIOUS OWNER'S DELAY IN OVERHAULING THE ENGINE AND HIS FAILURE TO ADHERE TO THE MANUFACTURER'S RECOMMENDED MAINTENANCE INSTRUCTIONS AND ROUGH TERRAIN IN THE TOUCHDOWN AREA OF THE EMERGENCY LANDING.
Accident investigation:
 |
|
Sources:
NTSB FTW90LA010
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 19:32 | ASN Update Bot | Added |
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