# NTSB LAX86LA241: Boeing A75N1, N62763, Sonoma, CA, June 5, 1986

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: June 5, 1986, 15:30 local (22:30 UTC)
- Place: Sonoma, CA
- Coordinates: 38.240531, -122.459152 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.2405&lon=-122.4592&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 25174
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86LA241
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25174/pdf
- Page: https://openairdocs.org/ntsb/LAX86LA241

## Sequence of events

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

- In flight collision with object, approach - vfr pattern - final approach
  - object - utility pole (contributing factor)
  - clearance - not maintained, pilot in command (cause)
  - altitude - inadequate, pilot in command (cause)

## Analysis

THE ACFT COLLIDED WITH A POLE AND CRASHED IN A FLOODED FIELD WHILE ON FINAL APPROACH. THE PILOT INDICATED THAT HE FLEW A 20 MINUTE LOCAL VFR FLIGHT PRIOR TO THE ACCIDENT. HE STATED HE HAD SUFFERED HEAD INJURIES AND WAS UNABLE TO RECALL ANY DETAILS OF THE ACCIDENT AFTER THE ACFT STRUCK THE POLE. EXAMINATION OF THE ENGINE REVEALED MINOR IMPACT DAMAGE AND MUD AND RUST DEPOSITS. THE RIGHT MAGNETO WAS RUSTED SHUT. EXAMINATION OF THE PROPELLER REVEALED ONE BLADE BENT FORWARD AND THE OTHER DAMAGED DUE TO A STRIKE. THE ENGINE WAS RUN ON A TEST STAND WITHOUT ANY PROBLEMS AFTER THE ENGINE OIL WAS CHANGED AND THE RIGHT MAGNETO REPLACED.

## Aircraft

- Registration: [N62763](https://openairdocs.org/deregistered/N62763-1997-04-10), registration cancelled 1997-04-10, S/N 752467GMR (OpenAirDocs)
- Reported make and model: BOEING A75N1
- Registry model: [Boeing / Ryan STEARMAN A75N1](https://openairdocs.org/model/boeing-ryan-stearman-a75n1) (registry code 1380158) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-2467
- Airframe hours: 2006
- Engines: CONTINENTAL W670-6A 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Gustaf Friesen, doing business as Aero Schellville
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Last inspection: Annual, June 1, 1986, 90 hours before
- Departed: OQ3, SONOMA, CA
- Airport: 0Q3, Sonoma Valley, runway 25, 2,700 × 75 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 22; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: rear; flight hours: 853 total, 115 in this make and model, 799 as pilot in command, 217 in the last 90 days, 87 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 13 knots
- Visibility: 25 statute miles
- Lowest ceiling: 3,000 ft broken
- Altimeter: 29.00 inHg
- Observed at: APC, 8 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 19860605022889A](https://openairdocs.org/incident/19860605022889A), Jun 5, 1986: Boeing A75N1, Sonoma, CA, Substantial damage. Aircraft struck a pole on final and impacted in a flooded field. No engine problems found during test run.

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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