ASN Wikibase Occurrence # 378518
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| Date: | Wednesday 5 September 1984 |
| Time: | 10:00 LT |
| Type: |  Mooney M20F |
| Owner/operator: | Robert B Anderson Jr |
| Registration: | N9121V |
| MSN: | 690029 |
| Year of manufacture: | 1969 |
| Engine model: | Lycoming IO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Saratoga, WY -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Fort Collins, CO (FML |
| Pocatello, ID (KPIH) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE IN LEVEL CRUISE FLT AT 10500 FT, THE PLT HEARD A HIGH-PITCHED WHINE THAT LASTED FOR ABOUT 5 SECONDS. THE ENGINE THEN SEIZED AND THE PLT MADE A FORCED LANDING IN MOUNTAINOUS FOOTHILLS. DURING THE LANDING ROLL, THE LANDING GEARCOLLAPSED. EXAMINATION OF THE DISASSEMBLED ENGINE REVEALED EVIDENCE OF HIGH HEAT DISTRESS AND A FRACTURED CRANKSHAFT. DETAILED EXAMINATION OF THE CRANKSHAFT REVEALED EVIDENCE OF A LACK OF LUBRICATION AND FATIGUE. MAINTENANCE RECORDS REVEALED THAT THE ACFT WAS INVOLVED IN A GEAR COLLAPSE INCIDENT IN 1977 THAT RESULTED IN A PROP STRIKE AND SUDDEN ENGINESTOPPAGE. THE ENGINE WAS NOT DISASSEMBLED AND INSPECTED AT THAT TIME AS SUGGESTED BY AVCO LYCOMING SERVICE LETTER NO. L163B.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB DEN84IA281
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 31-Mar-2024 09:29 | ASN Update Bot | Added |
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