# NTSB LAX92LA259: Grumman G-164B, N48658, Robbins, CA, June 23, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 23, 1992, 07:30 local (14:30 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: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27658
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA259
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27658/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA259

## Probable cause

THE FAILURE OF THE PILOT TO MAINTAIN AN ADEQUATE WING TIP CLEARANCE BETWEEN THE AIRCRAFT AND A DIRT BANK PARALLELING THE AIRSTRIP.

## Sequence of events

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

- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - dirt bank/rising embankment
  - clearance - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command
- Main gear collapsed, landing - roll
  - landing gear,main gear attachment - overload

## Analysis

THE PILOT SAID THAT ON TOUCHDOWN THE LOWER LEFT WING CONTACTED A DIRT BANK WHICH SLEWED THE AIRCRAFT INTO A RIGHT SIDEWAYS SKID.  THE RIGHT MAIN LANDING GEAR SEPARATED FROM THE AIRCRAFT.  FAA INSPECTORS REPORTED NO PREIMPACT MECHANICAL FAILURES OR FAILURES.

## Aircraft

- Registration: [N48658](https://openairdocs.org/deregistered/N48658-2022-03-21), registration cancelled 2022-03-21, S/N 125B, built 1976 (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 R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 125B
- Airframe hours: 8216
- Engines: P&W R1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Wagner Aviation
- Registered owner: Wagner Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, June 16, 1992, 94 hours before
- Airport: NONE, Akins Farm Airstrip, runway 18, 2,000 × 50 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 5,715 total, 1,355 in this make and model, 5,556 as pilot in command, 448 in the last 90 days, 155 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 63 °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 19920623021689A](https://openairdocs.org/incident/19920623021689A), Jun 23, 1992: Scwzer G164B, Robbins, CA, Substantial damage. Landing on Private strip left wing caught on a dirt bank. Slewed sideways into right sideways skid. Gear collapsed.

## Other investigations on N48658 (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 LAX91LA214](https://openairdocs.org/ntsb/LAX91LA214), May 14, 1991: Grumman G164B (N48658), Yuba City, CA, substantial damage. Probable cause: FATIGUE IN THE PROPELLER BLADE WHICH LED TO ITS ULTIMATE FAILURE. FACTORS RELATING TO THIS ACCIDENT WERE THE SOFT TERRAIN CONDITIONS ON WHICH THE AIRPLANE LANDED AND A BERM ACROSS THE AIRPLANE'S…

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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