ASN Wikibase Occurrence # 382479
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Date: | Saturday 5 March 1983 |
Time: | 21:00 LT |
Type: | Cessna 401 |
Owner/operator: | Doug Bensing |
Registration: | N7864F |
MSN: | 401-0207 |
Year of manufacture: | 1968 |
Engine model: | Continental TSIO-520 |
Fatalities: | Fatalities: 0 / Occupants: 6 |
Aircraft damage: | Minor |
Category: | Serious incident |
Location: | Bethel, AK -
United States of America
|
Phase: | En route |
Nature: | Executive |
Departure airport: | BETHEL (KBET) |
Destination airport: | (KFAI) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE ACFT RIGHT ENGINE STARTED EMITTING SPARKS FROM THE COWLING DURING NORMAL CRUISE. THE PILOT NOTED A DROP IN MANIFOLD PRESSURE SO HE REDUCED POWER ON THAT ENGINE AND THE SPARKS STOPPED. THE ACFT WAS LANDED AT BETHEL. THE FIRE DEPT. USED A FIRE EXTINGUISHING AGENT ON THE ENGINE. THE DAMAGE WAS MINOR. INSPECTION OF THE RIGHT ENGINE REVEALED A BROKEN BOLT ONTHE EXHAUST CLAMP WHICH SECURED THE EXHAUST PIPE TO THE TURBOCHARGER. THE CLAMP WHICH SECURED THE PIPE TO THE ENGINE NACELLE HAD SLIPPED OFF THE BRACKET. THIS ALLOWED THE PIPE TO SLIP DOWN AND RELEASE HOT EXHAUST GASES INTO THE ENGINE NACELLE. THIS HEATED THE ENGINE EXCESSIVELY AND REMOVED THE WASTE GATE FROM THE OPERATIONAL SYSTEM OF THE ENGINE. THE BROKEN BOLT IS A PART OF THE CLAMP P/N MVT 68637-375M.
Probable Cause:
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | ANC83IA053 |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
NTSB ANC83IA053
Location
Revision history:
Date/time | Contributor | Updates |
02-Apr-2024 14:19 |
ASN Update Bot |
Added |
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