# NTSB LAX88DVG09: Schweizer G-164B, N3633C, Robbins, CA, July 30, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: July 30, 1988, 08:00 local (15:00 UTC)
- Place: Robbins, CA
- Coordinates: 38.889865, -121.800727 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.8899&lon=-121.8007&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 29, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25771
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX88DVG09
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25771/pdf
- Page: https://openairdocs.org/ntsb/LAX88DVG09

## 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 - high vegetation (contributing factor)
  - clearance - misjudged, pilot in command (cause)
  - visual lookout - inadequate, pilot in command (cause)
- Nose over, landing - roll

## Analysis

DURING LANDING ROLL, AFTER AN AERIAL APPLICATION FLIGHT, THE SPRAYBOOM BECAME ENTANGLED IN WEEDS. THE AIRPLANE GROUND LOOPED AND NOSED OVER. THERE WERE NO REPORTED MECHANICAL FAILURES OR MALFUNCTIONS OF THE AIRPLANE AT THE TIME OF THE ACCIDENT.

## Aircraft

- Registration: [N3633C](https://openairdocs.org/aircraft/N3633C), registered now, S/N 776B (OpenAirDocs)
- Reported make and model: Schweizer G-164B
- Registry model: [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b) (registry code 8059055) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 776B
- Airframe hours: 1301
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Gregg L. Foster
- Registered owner: Sunrise Dusters Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 15, 1988, 335 hours before
- Departed: SUFFER CITY, CA
- Airport: Private Dirt Strip, runway 18, 5,280 × 55 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: helicopter, airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 12,000 total, 1,500 in this make and model, 11,700 as pilot in command, 250 in the last 90 days, 75 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 7 knots
- Visibility: 15 statute miles
- Lowest ceiling: 20,000 ft broken
- Temperature: 79 °F, dew point 57 °F
- Altimeter: 29.00 inHg
- Observed at: MYV, 12 nm away

## 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 19880730028519A](https://openairdocs.org/incident/19880730028519A), Jul 30, 1988: Scwzer G164B, Robbins, CA, Substantial damage. Sprayboom contacted weeds on edge of the landing strip causing aircraft to swing into an embankment.

## Other investigations on N3633C (3)

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 WPR14LA201](https://openairdocs.org/ntsb/WPR14LA201), May 13, 2014: Schweizer G 164B (N3633C), Biggs, CA, substantial damage. Probable cause: The assembler’s improper fabrication of a fuel line (hose) and the subsequent failure to verify that it was not occluded, which resulted in fuel starvation and a total loss of engine power during…
- [NTSB WPR10LA253](https://openairdocs.org/ntsb/WPR10LA253), May 21, 2010: Schweizer G-164B (N3633C), Robbins, CA, substantial damage. Probable cause: The failure of the wheel hub flange, which allowed the over size tire to expand and impinge on the brake disc and caliper, which resulted in a loss of control during the landing.
- [NTSB LAX92LA126](https://openairdocs.org/ntsb/LAX92LA126), Feb 25, 1992: Grumman G-164B (N3633C), Dixon, CA, substantial damage. Probable cause: THE PILOT'S PREMATURE LIFT-OFF. CONTRIBUTING TO THE ACCIDENT WAS THE INADVERTENT STALL/MUSH AND THE SOFT DIRT AIRSTRIP.

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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