# NTSB LAX85LA284: Grumman G-164, N73646, Glenn, CA, June 19, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 19, 1985, 12:00 local (19:00 UTC)
- Place: Glenn, CA
- Coordinates: 39.600521, -122.019165 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.6005&lon=-122.0192&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24747
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX85LA284
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24747/pdf
- Page: https://openairdocs.org/ntsb/LAX85LA284

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - engine assembly,cylinder - cracked (contributing factor)
- Forced landing, descent
- In flight collision with terrain/water, landing
  - terrain condition - dirt bank/rising embankment (cause)

## Analysis

DURING INITIAL CLIMB ON AN AG FLIGHT THE PLT REPORTED EXPERIENCING A LOSS OF ENG POWER. FROM THE ACFT'S ALT OF 30 FT AGL THE PLT ATTEMPTED AN EMERGENCY LANDING BUT DID NOT HAVE SUFFICIENT ALT TO NEGOTIATE A TURN BACK TOWARD THE ROAD FROM WHICH HE HAD DEPARTED. DURING THE TURN THE ACFT COLLIDED WITH A BERM & NOSED OVER. EXAM OF THE ENG REVEALED CRACKS IN CYL #7, WHICH RESULTED IN IMPROPER COMBUSTION & A LOSS OF PWR.

## Aircraft

- Registration: [N73646](https://openairdocs.org/deregistered/N73646-1998-09-12), registration cancelled 1998-09-12, S/N 100 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Category: Airplane
- Serial number: 100
- Airframe hours: 11000
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Mann And Sons
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 18, 1985, 300 hours before
- Departed: GLENN, CA
- Destination: WLW, WILLLOWS, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 1,258 total, 664 in this make and model, 1,206 as pilot in command, 332 in the last 90 days, 124 in the last 30 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 45 statute miles
- Lowest ceiling: none
- Temperature: 82 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19850619030099A](https://openairdocs.org/incident/19850619030099A), Jun 19, 1985: Scwzer G164, Glenn, CA, Substantial damage. Engine power loss during spraying run. Landed in a field. Hit a berm and nosed over. NR7 cylinder was cracked.

## Other investigations on N73646 (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 OAK74DVG47](https://openairdocs.org/ntsb/OAK74DVG47), Apr 18, 1974: Grumman G-164 (N73646), Grimes, CA, substantial damage

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.

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