ASN Wikibase Occurrence # 290875
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| Date: | Tuesday 4 August 2015 |
| Time: | 08:30 LT |
| Type: |  Grumman G-164B |
| Owner/operator: | Valley Air Service Ltd |
| Registration: | N48452 |
| MSN: | 24B |
| Year of manufacture: | 1976 |
| Total airframe hrs: | 16060 hours |
| Engine model: | Pratt & Whitney R-1340 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Princeton, California -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Colusa, CA (O08) |
| Colusa, CA (O08) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, during the agricultural spray run, the engine lost power. The airplane was unable to maintain altitude, so the pilot made a forced landing to a rice field. After touchdown, the airplane nosed over, which resulted in substantial damage to the rudder.
A postaccident examination of the engine revealed that the No. 2 cylinder head had cracked and lifted under the cooling fins on the cylinder's left side. The crack continued across the top and inside of the head to the intake valve seat, which would have allowed hot gases to enter the induction system and resulted in the subsequent loss of power. A review of the airplane's maintenance records revealed that a mandatory 100-hour repetitive visual inspection of the cylinder had been performed 66.7 flight hours before the accident flight.
Probable Cause: The loss of engine power during an agricultural application flight due to a cylinder failure.
Accident investigation:
 |
|
Sources:
NTSB WPR15LA230
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Oct-2022 06:43 | ASN Update Bot | Added |
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