ASN Wikibase Occurrence # 365941
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| Date: | Saturday 17 November 1990 |
| Time: | 12:50 LT |
| Type: |  Mooney M20E |
| Owner/operator: | Private |
| Registration: | N5703Q |
| MSN: | 711 |
| Year of manufacture: | 1965 |
| Total airframe hrs: | 3689 hours |
| Engine model: | LYCOMING IO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Tuba City, AZ -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| Grand Canyon, AZ | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT HAD REPEATEDLY EXPERIENCED A ROUGH RUNNING ENG DURING HIS CROSS-COUNTRY FLT FROM SANTE FE. HE HAD ALSO OBSERVED HIGH ENG AND OIL TEMPS. HE MADE A PRECAUTIONARY LANDING AND REQUESTED THAT A MECHANIC REPAIR THE ENG. HE THEN TOOK OFF AND CONTINUED HIS PLANNED FLIGHT. ONCE AGAIN THE ENG RAN ROUGH, AND HE MADE ANOTHER PRECAUTIONARY LANDING. HE EXAMINED THE AIRPLANE AND ADDED FIVE QUARTS OF OIL TO THE ENG. DURING THE TAKEOFF ROLL THE ENG AGAIN RAN ROUGH. THE AIRPLANE OVERRAN THE END OF THE 2,000 FT DIRT RUNWAY AND COLLIDED WITH TERRAIN. EXAMINATION OF THE ENG REVEALED BROKEN RINGS IN TWO PISTONS, AND ALL OTHER PISTON RINGS HAD LOST THEIR TEMPER. DENSITY ALTITUDE ESTIMATED 6.700 FT.
Probable Cause: FAILURE OF THE PISTON RINGS WHICH REDUCED THE AVAILABLE ENGINE POWER, AND THE PILOT'S CONTINUED OPERATION OF HIS AIRPLANE WITH A KNOWN ENGINE DEFICIENCY DURING THE RELATIVELY HIGH DENSITY ALTITUDE CONDITIONS.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA033
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 15:41 | ASN Update Bot | Added |
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