# NTSB LAX82FA261: Cessna 150M, N704GL, Lake Isabella, CA, July 17, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: July 17, 1982, 09:30 local (16:30 UTC)
- Place: Lake Isabella, CA
- Coordinates: 35.639953, -118.460731 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.6400&lon=-118.4607&mi=10
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 17, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 71325
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX82FA261
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71325/pdf
- Page: https://openairdocs.org/ntsb/LAX82FA261

## Sequence of events

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

- Airframe/component/system failure/malfunction, unknown
  - engine accessories,engine starter - disintegrated (cause)
  - lubricating system - contamination
  - engine assembly,bearing - overtemperature
  - engine assembly,connecting rod - failure,total
  - engine assembly - vibration
- Loss of engine power(partial) - mech failure/malf, climb - to cruise
- Forced landing, landing
- On ground/water collision with object, landing - roll
  - object - fence (contributing factor)

## Analysis

AFTER TAKEOFF, THE ACFT WAS FLOWN APRX 5 MI SOUTH OF THE ARPT & WAS AT ABOUT 1000 FT ABOVE A LAKE WHEN THE ENG BEGAN VIBRATING VIOLENTLY & LOSING POWER. THE PLT TURNED TOWARD THE SHORE & TRIED VARIOUS MIXTURE SETTINGS IN AN ATTEMPT TO CORRECT THE PROBLEM. SUBSEQUENTLY, DURING A FORCED LANDING, THE ACFT COLLIDED WITH A FENCE. AN EXAM OF THE ENG REVEALED THAT THE STARTER GEAR WAS DETACHED FROM THE STARTER SHAFT. METAL FRAGMENTS WERE FOUND IN NUMEROUS AREAS OF THE ENG, INCLUDING THE OIL SCREEN, WHICH HAD COLLAPSED. THE OIL PUMP GEAR CAVITIES WERE SCORED, AS WELL AS THE CRANKSHAFT MAIN JOURNAL BEARINGS, WHICH EXHIBITED EXTENSIVE COPPER LAYER EXPOSURE. THE FRONT JOURNAL BEARINGS WERE ALSO EMBEDDED WITH ALUMINUM. THE #1 CONNECTING ROD HAD SEPARATED FROM ITS CRANKPIN. THE CRANKPIN WAS DISCOLORED & HAD FRAGMENTS OF STEEL WELDED TO THE JOURNAL. BOTH CONNECTING ROD CAP BOLTS OF THE FAILED ROD WERE NECKED DOWN AT THE FRACTURE FACES.

## Aircraft

- Registration: [N704GL](https://openairdocs.org/deregistered/N704GL-1985-05-13), registration cancelled 1985-05-13, S/N 15078599 (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Category: Airplane
- Serial number: 15078599
- Airframe hours: 2714
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Rialto Avn. Inc.
- Registered owner: Rialto Avn. Inc.
- Departed: L05, KERNVILLE, CA
- Destination: L67, RIALTO, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 120 total, 30 in this make and model, 4 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 315° at 5 knots
- Visibility: 15 statute miles
- Temperature: 162 °F
- Altimeter: 29.00 inHg

## 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 19820717029819A](https://openairdocs.org/incident/19820717029819A), Jul 17, 1982: Cessna 150M, Kernville, CA, Substantial damage. Engine quit

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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