# Accident 20090728014689A: Allied G164A, Riverdale, CA, July 28, 2009

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 28, 2009, 11:00 local time
- Place: Riverdale, CA
- Damage: Substantial damage
- Phase of flight: Landing
- Operating rules: Agricultural (Part 137)
- Operator: PXAG
- Location: 36.4183° N, 119.9519° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=36.4183&lon=-119.9519&mi=10
- Aircraft: N8741H, a cancelled registration (https://openairdocs.org/deregistered/N8741H-2024-06-15) (OpenAirDocs)
- Registry model: Grumman G-164A (registry code 3952704, https://openairdocs.org/model/grumman-g-164a) (OpenAirDocs)
- Reported make and model: ALLIED G164A
- Reported engine: PWA R134059
- Fatal injuries: 0
- Other injuries: 0
- Pilot flight hours: 0 total, 0 in this make and model, 0 in the last 90 days
- NTSB investigation: [NTSB WPR09LA373](https://openairdocs.org/ntsb/WPR09LA373) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20090728014689A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) PILOT STATED THAT WHILE MANEUVERING DURING AERIAL APPLICATION, THE ENGINE LOST POWER.  AN EMERGENCY LANDING WAS INITIATED IN A ALFALFA FIELD THAT WAS PART OF THE APPLICATION ORDER.  THE AIRCRAFT TOUCHED DOWN IN A THREE POINT ATTITUDE, BUT DUE TO THE FACT THAT THE FIELD WAS CURRENTLY BEING FLOOR IRRIGATED.  THE SOFT GROUND CAUSED THE AIRCRAFT BECOME INVERTED DURING ROLLOUT.  INSPECTION OF THE AIRCRAFT AT SITE FOUND THAT THE ENGINE APPEARS TO HAVE SEIZED.  NO CAUSE HAS BEEN MADE AT THIS TIME FOR THE ENGINE FAILURE.  AMENDMENT 08/03/2009 - INSPECTION OF THE ENGINE AS THE AIRCRAFT WAS RECOVERED FROM THE ALFALFA FIELD FOUND THAT THE ENGINE HAD SEIZED PRIOR TO LANDING AS INDICATED BY NO ROTATIONAL DAMAGE TO THE PROPELLER.  INSPECTION OF THE ENGINE OIL SUMP CHIP PLUG FOUND THE MAGNET COVERED WITH FERROUS MATERIAL.  THE PILOT STATED THAT THE CHIP PLUG WARNING LIGHT WAS FUNCTIONAL AND WAS CHECKED REGULARLY, HOWEVER, SINCE THE ENGINE WAS RAPIDLY FAILING, HE DID OT BOTHER TO CHECK THE ENGINE INSTRUMENTS AND CONCENTRATED ON THE EMERGENCY LANDING.  THE AIRCRAFT LANDED IN A MUDDY FIELD AND ENDED UP ON ITS BACK WITH THE ENGINE REMOVED, SO A CONTINUITY OF THE CHIP PLUG WARNING LIGHT SYSTEM COULD NOT BE PERFORMED.  NO EXTERNAL FAILURE OF THE ENGINE WAS EVIDENT.  THE ENGINE WILL BE SHIPPED TO AERO ENGINES, LOS ANGLES, CA FOR TEAR DOWN INSPECTION.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR09LA373](https://openairdocs.org/ntsb/WPR09LA373), Jul 28, 2009: Grumman G164 (N8741H), Riverdale, CA, substantial damage. Probable cause: The partial loss of engine power due to the failure of the engine's supercharger-blower.

## Other reports on N8741H (1)

Matched to the same aircraft by N-number and date.

- [Accident 19861124068029A](https://openairdocs.org/incident/19861124068029A), Nov 24, 1986: Scwzer G164A (N8741H), Fresno, CA, Substantial damage. The aircraft struck wires during aerial spraying operations. The pilot was attempting to underfly the wires.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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