# NTSB SEA84LA027: Cessna 150F, Prosser, WA, December 17, 1983

- Type: NTSB accident investigation
- Date: December 17, 1983, 18:00 UTC, 10:00 local
- Place: Prosser, WA
- Coordinates: 46.119228, -119.68048 (estimated)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39856
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA027
- NTSB report (PDF): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39856/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA027

## Analysis

ACCORDING TO THE PILOT SHORTLY AFTER DEPARTURE THE ENGINE BEGAN RUNNING ROUGH FOR THE SECOND TIME. THE PILOT ELECTED TO MAKE A PRECAUTIONARY LANDING ON A GRAVEL ROAD HE WAS FAMILIAR WITH. DURING THE LANDING FLARE, WITH A GUSTY CROSSWIND, DIRECTIONAL CONTROL WAS LOST. THE AIRCRAFT STRUCK A FROZEN FURROWED FIELD AND CAME TO REST INVERTED. BOTH PLUGS FROM THE LEFT REAR CYLINDER WERE CARBON FOULED. ALL THE SPARKPLUGS SHOWED EXCESSIVELY ERODED CENTER ELECTRODES.

## Sequence of events

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - ignition system,spark plug - worn (contributing factor)
  - preflight planning/preparation - inadequate, pilot in command (cause)
  - ignition system,spark plug - leaded (contributing factor)
  - aircraft service - not performed, company maintenance personnel (cause)
  - weather condition - crosswind (contributing factor)
  - weather condition - gusts (contributing factor)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - precautionary landing - attempted, pilot in command (contributing factor)
  - in-flight planning/decision - poor, pilot in command (cause)
- Nose over, landing - roll

## Aircraft

- Registration: N6841F, a cancelled registration (https://openairdocs.org/deregistered/N6841F-2013-06-27) (OpenAirDocs)
- Reported make and model: CESSNA 150F
- Registry model: Cessna 150F (registry code 2071814, https://openairdocs.org/model/cessna-150f) (OpenAirDocs)
- Registry engine: Continental 0-200 series (registry code 17020, https://openairdocs.org/engine/continental-0-200-series) (OpenAirDocs)
- Category: Airplane
- Serial number: 15063441
- Airframe hours: 2858
- Engines: CONTINENTAL O-200 100 horsepower
- Damage: Substantial damage
- Flight: Personal, Part 91
- Departed: S40, PROSSER, WA
- Destination: 1SB, SUNNYSIDE, WA
- Airport: runway 0
- FAA reports: 19831217062179A (https://openairdocs.org/incident/19831217062179A) (OpenAirDocs)

## Flight crew

- Pilot; age 18; student; medical class 3; hours: 5 24 hours, 5 24 hours in this make and model, 48 90 days, 48 90 days in this make and model, 48 pic, 48 pic in this make and model, 76 total, 66 total in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 7 knots
- Visibility (statute miles): 60
- Temperature (°F): 21.2

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.