# NTSB LAX89DVG04: Schweizer G-164C, N6569K, Bayless, CA, February 3, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: February 3, 1989, 12:00 local (19:00 UTC)
- Place: Bayless, CA
- Coordinates: 39.500125, -122.279296 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5001&lon=-122.2793&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 22, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 26166
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX89DVG04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26166/pdf
- Page: https://openairdocs.org/ntsb/LAX89DVG04

## Probable cause

THE DEPARATION OF A TURBINE BLADE FOLLOWED BY A FORCED LANDING DURING WHICH THE LANDING GEAR COLLAPSED DUE TO OVERLOAD FORCES.

## 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, cruise
  - turbine assembly,turbine blade - separation (cause)
- Forced landing, descent - emergency
- Main gear collapsed, landing - roll
  - landing gear,main gear - overload (contributing factor)

## Analysis

DURING CRUISE FLIGHT, N6569K EXPERIENCED A TOTAL LOSS OF ENGINE POWER. FLAMES AND PIECES OF METAL WERE OBSERVED COMING FROM THE ENGINE EXHAUST PIPE OF THE PRATT & WHITNEY PT6A TURBINE ENGINE. THE PILOT INITIATED A FORCED LANDING. DURING THE LANDING ROLL, THE LANDING GEAR COLLAPSED AND THE AIRPLANE COLLIDED WITH THE TERRAIN. DURING POST ACCIDENT INVESTIGATION THE ENGINE WAS DISASSEMBLED AND IT WAS FOUND THAT A PIECE FROM ONE OF THE TURBINE BLADES SEPARATED AND DAMAGED THE REMAINING TURBINE ASSEMBLIES DOWN STREAM.

## Aircraft

- Registration: N6569K (not matched to a registry record)
- Reported make and model: SCHWEIZER G-164C
- Category: Airplane
- Serial number: 5C
- Engines: P&W PT6A-34 750 horsepower turbo prop
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Chuck Jones Flying Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, November 5, 1988, 67 hours before
- Departed: PVT, GLENN, CA
- Airport: Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 9,000 total, 5,000 in this make and model, 8,900 as pilot in command, 350 in the last 90 days, 100 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 225° at 8 knots, gusting 12
- Visibility: 10 statute miles
- Lowest ceiling: 2,000 ft broken
- 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 19890203002149A](https://openairdocs.org/incident/19890203002149A), Feb 3, 1989: Scwzer G164C, Bayless, CA, Substantial damage. Engine lost power. Collapsed landing gear on hard forced landing. A turbine blade broke off destroying the engine.

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.