# NTSB LAX87DVG04: Schweizer G-164B, N3633B, Pleasant Grove, CA, April 28, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: April 28, 1987, 08:10 local (15:10 UTC)
- Place: Pleasant Grove, CA
- Coordinates: 38.829708, -121.500137 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.8297&lon=-121.5001&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 14, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25341
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX87DVG04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25341/pdf
- Page: https://openairdocs.org/ntsb/LAX87DVG04

## Sequence of events

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

- Loss of engine power, maneuvering - turn to reverse direction
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - rough/uneven (contributing factor)
- Nose over, landing - roll

## Analysis

DURING AN AERIAL APPLICATION FLIGHT, THE PILOT REPORTED THAT DURING A TURN FOR THE NEXT PASS OVER THE FIELD, THE ENGINE QUIT. THE AIRCRAFT WAS TURNED INTO THE WIND AND WAS LANDED ON A ROUGH PLOWED FIELD. DURING THE LANDING ROLL THE AIRCRAFT NOSED OVER. THE ACFT WAS NOT EXAMINED AT THE SCENE. TO DATE, THE OPERATOR HAS NOT REPORTED ANY FAILURES OR MALFUNCTIONS OF THE ENGINE.

## Aircraft

- Registration: N3633B (not matched to a registry record)
- Reported make and model: SCHWEIZER G-164B
- Category: Airplane
- Serial number: 775B
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Onstott Dusters, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, February 17, 1987, 27 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 13,000 total, 500 in this make and model, 11,850 as pilot in command, 200 in the last 90 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 50° at 12 knots, gusting 15
- Visibility: 50 statute miles
- Lowest ceiling: none

## 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 19870428011739A](https://openairdocs.org/incident/19870428011739A), Apr 28, 1987: Scwzer G164B, Pleasant Grove, CA, Substantial damage. The engine failed during an aerial application flight. The aircraft nosed over on landing.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.