ASN Wikibase Occurrence # 131861
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Date: | Wednesday 28 July 1999 |
Time: | 06:50 |
Type: | Rockwell S-2R Thrush Commander |
Owner/operator: | Gary Flying Service, Inc. |
Registration: | N8482V |
MSN: | 2242R |
Total airframe hrs: | 4579 hours |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Isola, MS -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Agricultural |
Departure airport: | Belzoni, MS |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:While performing aerial application the pilot stated the engine backfired twice, lost oil pressure, backfired again, and then shutdown. While making a forced landing, the aircraft collided with a ditch and a post crash fired erupted. Postcrash examination of the engine under FAA supervision showed the No. 4 cylinder had compression of 35 over 80 psi and was leaking through the intake valve. Also, 7 of 18 valves were not adjusted within manufacturer's limits and all spark plug gaps were above manufacturer's limits.
Probable Cause: Failure of the No. 4 cylinder due to a leaking intake valve resulting in loss of engine power and collision with a ditch while making a forced landing on unsuitable terrain. Contributing to the accident was improper maintenance adjustment of the engine valves and spark plugs.
Sources:
NTSB:
https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X19321&key=1 Revision history:
Date/time | Contributor | Updates |
21-Dec-2016 19:25 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
14-Dec-2017 08:43 |
ASN Update Bot |
Updated [Departure airport, Source, Narrative] |
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