ASN Wikibase Occurrence # 372727
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Date: | Sunday 5 July 1987 |
Time: | 09:30 LT |
Type: | Mustang Aeronautics Midget Mustang MM-1 |
Owner/operator: | John W Hutchison |
Registration: | N68WK |
MSN: | 711 |
Engine model: | LYCOMING O-235-C |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Window Rock, AZ -
United States of America
|
Phase: | Initial climb |
Nature: | Private |
Departure airport: | (P34) |
Destination airport: | (P34) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE AIRCRAFT LOST POWER SHORTLY AFTER TAKEOFF AND COLLIDED WITH A DIRT BANK DURING THE SUBSEQUENT FORCED LANDING. ENGINEEXAMINATION REVEALED AN OPEN INTAKE VALVE ON THE NUMBER 4 CYLINDER AND THE PILOT STATED A 'BENT AND CRACKED CRANKSHAFT FROM A PRIOR ACCIDENT' WAS DISCOVERED DURING THE ENGINE EXAMINATION. THE ENGINE MANUFACTURER STATED THAT AN OPEN INTAKE VALVE COULD INDUCE SIGNIFICANT POWER LOSS BY ALLOWING EXHAUST GASSES TO PRESSURIZE THE INTAKE MANIFOLD, THEREBY ALTERINGTHE FUEL/AIR MIXTURE. THE MAINTENANCE RECORDS ESTABLISHED THAT THE AIRCRAFT HAD FLOWN ONLY NINE HOURS SINCE THE LAST CONDITION INSPECTION.
Probable Cause:
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | LAX87DUJ07 |
Status: | Investigation completed |
Duration: | 1 year and 9 months |
Download report: | Final report |
|
Sources:
NTSB LAX87DUJ07
Location
Revision history:
Date/time | Contributor | Updates |
26-Mar-2024 20:49 |
ASN Update Bot |
Added |
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