# NTSB LAX87DVG07: Grumman G-164A, N4623, Lambertsville, CA, May 8, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 8, 1987, 15:00 local (22:00 UTC)
- Place: Lambertsville, CA
- Coordinates: 39.110923, -122.270599 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.1109&lon=-122.2706&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 24, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25344
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX87DVG07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25344/pdf
- Page: https://openairdocs.org/ntsb/LAX87DVG07

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE PILOT STATED THAT SHORTLY AFTER TAKEOFF THE ENGINE 'CUT OUT' SEVERAL TIMES THEN QUIT COMPLETELY. THE PILOT MADE AN EMERGENCY LANDING ON A PLOWED FIELD AND DURING THE LANDING ROLL THE AIRCRAFT NOSED OVER. THE ACCIDENT WAS NOT REPORTED FOR 4 DAYS AND DURING THIS TIME THE OPERATOR PARTIALLY DISASSEMBLED THE AIRCRAFT. THE ENGINE WAS REMOVED AND TEST RUN. NO PREIMPACT MALFUNCTIONS/FAILURES WERE FOUND. THE ENGINE WAS FOUND TO OPERATE WITHIN NORMAL PARAMETERS SET BY THE MANUFACTURER. THERE WERE NO OTHER ABNORMALITIES FOUND.

## Aircraft

- Registration: [N4623](https://openairdocs.org/aircraft/N4623), registered now, S/N 1087, built 1973 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1087
- Airframe hours: 4725
- Engines: P&W R1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Bowles Flying Service
- Registered owner: Vince Crop Dusters Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, September 19, 1986, 225 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 9,852 total, 9,000 in this make and model, 9,000 as pilot in command, 100 in the last 90 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 95 °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 19870508012879A](https://openairdocs.org/incident/19870508012879A), May 8, 1987: Scwzer G164A, Lambertsville, CA, Substantial damage. The agricultural spray aircraft force landed in a rice field. The pilot reported intermittent engine operation.

## Other investigations on N4623 (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 LAX80DUJ86](https://openairdocs.org/ntsb/LAX80DUJ86), Jun 9, 1980: Grumman G-164A (N4623), Cotton Center, AZ, 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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