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| Date: | Monday 17 July 1995 |
| Time: | 08:15 LT |
| Type: |  Air Tractor AT-301 |
| Owner/operator: | Private |
| Registration: | N4326S |
| MSN: | 301-0006 |
| Total airframe hrs: | 7174 hours |
| Engine model: | P&W R-1340-AN1 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Roberts, ID -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Ferry/positioning |
| Departure airport: | |
| Rigby, ID (U56) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT REPORTED THAT SHORTLY AFTER TAKEOFF, AT 40 FEET ABOVE GROUND LEVEL, THE ENGINE LOST POWER AND BEGAN BACKFIRING. THE PILOT MADE A FORCED LANDING IN A BARLEY FIELD WITH 3-FOOT-TALL CROPS, AND THE AIRPLANE CARTWHEELED. POSTACCIDENT EXAMINATION OF THE ENGINE REVEALED THAT THE EXHAUST VALVE ROCKER ARM HOUSING ON THE NUMBER 3 CYLINDER SEPARATED, DISABLING THE NUMBER 3 CYLINDER EXHAUST VALVE.
Probable Cause: A LOSS OF ENGINE POWER DUE TO THE SEPARATION OF THE NUMBER 3 CYLINDER EXHAUST VALVE ROCKER ARM SHAFT FROM THE CYLINDER HEAD, WHICH DISABLED MOVEMENT OF THE EXHAUST VALVE. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB SEA95LA154
History of this aircraft
Other occurrences involving this aircraft
| 19 May 1998 | N4326S | Private | 0 | Idaho Falls, ID | |
sub |
| 1 August 2022 | N4326S | Stardust Ag Aviation | 0 | near Lamoni, IA | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 16:33 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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