ASN Wikibase Occurrence # 367999
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| Date: | Saturday 16 September 1989 |
| Time: | 20:55 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Private |
| Registration: | N738BB |
| MSN: | 17269839 |
| Total airframe hrs: | 1492 hours |
| Engine model: | LYCOMING O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Waxahachie, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Leonard, TX (TE06) |
| Kerrville, TX (KERV) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRPLANE EXPERIENCED A PARTIAL POWER LOSS, WHILE IN CRUISE FLIGHT AT 2,500 MSL OVER AN AIRPARK. AFTER REDUCING POWER AND APPLYING CARBURETOR HEAT, THE PILOT ATTEMPTED TO EXECUTE A FORCE LANDING TO THE AIRPARK. HOWEVER, SHE OVERSHOT AND LANDED IN A WET PLOWED FIELD BEYOND THE END OF THE RUNWAY. DURING ROLL OUT, THE GEAR DUG INTO THE SOFT TERRAIN AND THE AIRPLANE FLIPPED OVER. EXAMINATION OF THE ENGINE REVEALED THAT A PIECE OF THE #3 EXHAUST VALVE HAD SEPARATED AND HAD BEEN INGESTED. METALLURGICAL EXAMINATION OF THE FAILED VALVE INDICATED THAT IT HAD BEEN EXPOSED TO HIGH TEMPERATURE OPERATION. HOWEVER, THE EXACT ORIGIN OF THE SEPARATION WAS NOT DETERMINED DUE TO MASKING OF THE FRACTURE SURFACES, ACCUMULATION OF EXHAUST DEPOSITS AND POST-SEPARATION MECHANICAL DAMAGE.
Probable Cause: FAILURE OF THE #3 EXHAUST VALVE DUE TO EXPOSURE TO OVERTEMPERATURE OPERATING CONDITIONS.
Accident investigation:
 |
|
Sources:
NTSB FTW89LA165
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Mar-2024 06:07 | ASN Update Bot | Added |
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