ASN Wikibase Occurrence # 385921
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Date: | Saturday 12 May 2001 |
Time: | 10:30 LT |
Type: | Air Tractor AT-401 |
Owner/operator: | Private |
Registration: | N1008Q |
MSN: | 401-0702 |
Year of manufacture: | 1988 |
Total airframe hrs: | 3648 hours |
Engine model: | P&W R-1340 |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Warsaw, IL -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Agricultural |
Departure airport: | Ferris, IL |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The airplane sustained substantial damage when the airplane nosed over during a forced landing following an in-flight loss of engine power. The pilot reported no injuries. The pilot stated, "At approximately 10:30 AM spraying operation was nearing completion when in a pull out of the field being sprayed the engine made a bang, started running very rough and backfiring. Within a couple seconds the engine had lost all power and died. The pilot landed in a field that happened to be very soft and sandy. The aircraft rolled approximately 100 ft on its wheels before nosing over on its back. After further investigation it was determined a rocker shaft housing had broken on the #4 cylinder. As a result the exhaust valve was not opening. As the intake valve opened, it created backfiring into the induction system causing the engine to fail."
Probable Cause: the rocker assembly failure during low level maneuvering. Factors were the soft and sandy terrain and the unsuitable terrain the pilot encountered during the forced landing.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | CHI01LA135 |
Status: | Investigation completed |
Duration: | 3 months |
Download report: | Final report |
|
Sources:
NTSB CHI01LA135
Location
Revision history:
Date/time | Contributor | Updates |
05-Apr-2024 09:17 |
ASN Update Bot |
Added |
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