# NTSB LAX95LA195: Grumman G-164B, N6774K, Robbins, CA, May 25, 1995

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 24, 1995, 19:00 local (May 25, 1995, 02:00 UTC)
- Place: Robbins, CA
- Location: 38.8669° N, 121.7071° W: Placed by OpenAirDocs: center of Robbins, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.8669&lon=-121.7071&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 6, 1995
- Report: Approved by Office Director
- NTSB case key (mKey): 29103
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX95LA195
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/29103/pdf
- Page: https://openairdocs.org/ntsb/LAX95LA195

## Probable cause

a loss of engine power due to a separation of the number 6 cylinder, and the nose over during the subsequent forced landing.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, maneuvering - aerial application
  - engine assembly,cylinder - separation (cause)
- Forced landing, emergency landing
- Nose over, landing
  - terrain condition - rough/uneven

## Analysis

DURING AN AERIAL APPLICATION FLIGHT, THE PILOT EXPERIENCED A LOSS OF ENGINE POWER AND MADE A FORCED LANDING INTO A PLOWED FIELD WHERE IT NOSED OVER.  EXAMINATION OF THE ENGINE REVEALED THAT THE NO. 6 CYLINDER SEPARATED IN THE AREA OF THE COOLING FINS.

## Factual narrative

On May 24, 1995, at 1900 hours Pacific daylight time, the pilot of a Grumman G-164B, N6774K, experienced a loss of engine power during takeoff near Robbins, California.  The aircraft crashed into a plowed field and nosed over.  The aircraft received substantial damage and the pilot was not injured.  Visual meteorological conditions prevailed at the time for the local 14 CFR Part 137 aerial application flight.

The pilot reported that the No. 6 cylinder had separated in the area of the cooling fins.  The engine was overhauled on July 22, 1992, and had accumulated about 1,092 hours since overhaul.

## Aircraft

- Registration: [N6774K](https://openairdocs.org/deregistered/N6774K-2019-09-19), registration cancelled 2019-09-19, S/N 463B, built 1978 (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)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 463B
- Airframe hours: 8876
- Engines: P&W R-1340-ANI 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Wagner Aviation
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, May 8, 1995, 96 hours before
- Departed: KUSTER, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 11,993 total, 6,000 in this make and model, 11,993 as pilot in command, 224 in the last 90 days, 93 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 70 °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 19950524013009A](https://openairdocs.org/incident/19950524013009A), May 24, 1995: Scwzer G164B, Robbins, CA, Substantial damage. Lost power on climbout from ag strip. Nosed over in plowed field. NR6 cylinder cracked. 1092 hrs since overhaul.

## Other investigations on N6774K (2)

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 LAX04LA126](https://openairdocs.org/ntsb/LAX04LA126), Feb 17, 2004: Grumman-Schweizer G-164B (N6774K), Tracy, CA, substantial damage. Probable cause: A loss of engine power for undetermined reasons during cruise flight.
- [NTSB LAX94LA205](https://openairdocs.org/ntsb/LAX94LA205), Apr 23, 1994: Grumman G-164B (N6774K), Robbins, CA, substantial damage. Probable cause: THE PILOT'S IMPROPER USE OF THE BRAKES.

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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