ASN Wikibase Occurrence # 365181
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Date: | Friday 7 June 1991 |
Time: | 07:30 LT |
Type: | Enstrom F280C |
Owner/operator: | Private |
Registration: | N5695Y |
MSN: | 1205 |
Engine model: | LYCOMING H1O-360-E1AD |
Fatalities: | Fatalities: 0 / Occupants: 2 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Baggs, WY -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Private |
Departure airport: | Baggs, WY |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE PILOT OF THE ENSTROM F280C STATED THAT HE HEARD A LOUD NOISE WHILE FLYING AT 50-100 FEET AGL. HE THEN DESCENDED TO A FORCED LANDING AS THE ENGINE RPM DECREASED. HE SET THE AIRCRAFT DOWN HARD IN TALL SAGEBRUSH, CAUSING THE DOWNHILL SKID TO COLLAPSE. AS A RESULT OF THE HARD IMPACT THE MAIN ROTOR BLADES DROOPED AND SHEARED OFF THE TAIL BOOM. LATER INSPECTION OF THE ENGINE REVEALED THAT THE NUMBER THREE EXHAUST VALVE STEM HAD BROKEN AND THAT PARTS OF THIS VALVE HAD DESTROYED THE TURBOCHARGER AND BOTH SPARK PLUGS IN THE NUMBER THREE CYLINDER.
Probable Cause: EXHAUST VALVE FAILURE, RESULTING IN A PARTIAL POWER LOSS. CONTRIBUTING FACTORS WERE LOW ALTITUDE AND ROUGH/UNEVEN TERRAIN.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | SEA91LA128 |
Status: | Investigation completed |
Duration: | 1 year and 8 months |
Download report: | Final report |
|
Sources:
NTSB SEA91LA128
Location
Revision history:
Date/time | Contributor | Updates |
20-Mar-2024 07:29 |
ASN Update Bot |
Added |
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