# NTSB LAX89DVA05: Grumman G-164B, N6713Q, Westley, CA, March 18, 1989

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: March 18, 1989, 09:00 local (17:00 UTC)
- Place: Westley, CA
- Coordinates: 37.540504, -121.290756 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.5405&lon=-121.2908&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report January 22, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 26152
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX89DVA05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26152/pdf
- Page: https://openairdocs.org/ntsb/LAX89DVA05

## Probable cause

A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.  A FACTOR RELATED TO THE ACCIDENT WAS THE PROXIMITY OF OBSTRUCTIONS.

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - reason for occurrence undetermined (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
- In flight collision with terrain/water, maneuvering - turn to landing area (emergency)
  - terrain condition - high obstruction(s) (contributing factor)
  - maneuver - performed, pilot in command
  - airspeed - inadequate
  - stall/mush
- Nose over, other

## Analysis

THE PLT RPRTD THAT DURING AN AERIAL APPLICATION FLT, THE ENG LOST PARTIAL POWER. AS HE MANEUVERED TO AVOID OBSTACLES, THE ACFT MUSHED INTO A CULTIVATED FIELD & NOSED OVER. AN INSPECTION OF THE ENG & ACFT REVEALED NO REASON FOR THE LOSS OF POWER.

## Aircraft

- Registration: [N6713Q](https://openairdocs.org/deregistered/N6713Q-1990-09-19), registration cancelled 1990-09-19, S/N 229B (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Category: Airplane
- Serial number: 229B
- Airframe hours: 2773
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Valley Crop Dusters, Inc.
- Registered owner: Valley Crop Dusters, Inc
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, December 6, 1988, 55 hours before
- Departed: WESTLEY, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; commercial; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 5,079 total, 1,500 in this make and model, 4,861 as pilot in command, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 8 knots
- Visibility: 5 statute miles
- Lowest ceiling: 4,000 ft overcast
- Temperature: 55 °F, dew point 39 °F
- Altimeter: 29.00 inHg

## 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 19890318004989A](https://openairdocs.org/incident/19890318004989A), Mar 18, 1989: Scwzer G164B, Westley, CA, Substantial damage. Pilot reported power loss. Flipped over landing. No engine problems noted. Witness says engine running on impact.

## Other investigations on N6713Q (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 LAX83LA057](https://openairdocs.org/ntsb/LAX83LA057), Dec 9, 1982: Grumman G-164B (N6713Q), Westley, 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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