# NTSB SEA90LA094: Cessna A150M, N8175V, Seattle, WA, June 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 5, 1990, 14:40 local (21:40 UTC)
- Place: Seattle, WA
- Coordinates: 47.540317, -122.310699 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.5403&lon=-122.3107&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 20, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41205
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA094
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41205/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA094

## Probable cause

THE FUEL STARVATION CAUSED BY CARBURETOR CONTAMINANTS BLOCKING THE ACCELERATOR PUMP INLET CHECK VALVE ASSEMBLY AND MAIN NOZZLE ASSEMBLY.

## 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 - normal
  - fuel system,carburetor - contamination (cause)
  - fuel system,carburetor - corroded (cause)
  - fluid,fuel - starvation
- Forced landing, descent - emergency
- Nose down, landing - roll
  - terrain condition - rising (contributing factor)

## Analysis

N8175V WAS SUBSTANTIALLY DAMAGED DURING ROLL-OUT AFTER AN EMERGENCY LANDING. WHEN THE CARBURETOR WAS DISASSEMBLED, A SMALL RUST-BALL WAS FOUND IN THE CARBURETOR CAVITY BELOW THE MAIN NOZZLE ASSEMBLY, AND THE COIL SPRING COMPONENT OF THE ACCELERATOR PUMP PLUNGER ASSEMBLY WAS DETERMINED TO BE DISINTEGRATED AND CORRODED.

## Aircraft

- Registration: [N8175V](https://openairdocs.org/aircraft/N8175V), registered now, S/N A1500555, built 1974 (OpenAirDocs)
- Reported make and model: CESSNA A150M
- Registry model: [Cessna A150M](https://openairdocs.org/model/cessna-a150m) (registry code 2071831) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: A1500555
- Airframe hours: 3109
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Aero Flight Executive Services
- Registered owner: Aero Flight Executive Svc. Inc
- Airworthiness certificate: Standard, Aerobatic; Standard, Normal
- Last inspection: 100 hour, May 19, 1990, 8 hours before
- Airport: BFI, Boeing Field

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 735 total, 331 in this make and model, 664 as pilot in command, 210 in the last 90 days, 54 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: 20,000 ft broken
- Temperature: 68 °F, dew point 39 °F
- Altimeter: 29.00 inHg
- Observed at: BFI

## 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 19900605018519A](https://openairdocs.org/incident/19900605018519A), Jun 5, 1990: Cessna A150M, Seattle, WA, Substantial damage. Engine quit during descent. Landed in ball field. Nose gear folded.

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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