# NTSB SEA92LA006: Cessna C-150M, N9263U, Woodburn, OR, October 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: October 13, 1991, 17:40 local (Oct 14, 1991, 00:40 UTC)
- Place: Woodburn, OR
- Coordinates: 45.129463, -122.81948 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.1295&lon=-122.8195&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 14, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41600
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA92LA006
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41600/pdf
- Page: https://openairdocs.org/ntsb/SEA92LA006

## Probable cause

A SEIZED ENGINE EXHAUST VALVE.  FACTORS INCLUDE ROUGH TERRAIN AND A COLLAPSED NOSE GEAR.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise
  - engine assembly,valve,exhaust - seized (cause)
- Forced landing, descent - emergency
- Nose over, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)
  - landing gear,nose gear - collapsed (contributing factor)

## Analysis

THE STUDENT PILOT OF THE CESSNA 150 ELECTED TO MAKE AN EMERGENCY LANDING IN AN OPEN FIELD, WHEN SHE LOST PARTIAL POWER, AND EXPERIENCED SEVERE VIBRATIONS.  AFTER TOUCHDOWN ON THE ROUGH TERRAIN, THE NOSE GEAR COLLAPSED AND THE AIRCRAFT NOSED OVER.  LATER INVESTIGATION REVEALED THAT AN EXHAUST VALVE WAS SEIZED IN ITS GUIDE, AND WAS STUCK IN THE OPEN POSITION.

## Aircraft

- Registration: [N9263U](https://openairdocs.org/deregistered/N9263U-2013-05-22), registration cancelled 2013-05-22, S/N 15078213, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA C-150M
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15078213
- Engines: CONTINENTAL O-200A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Cascade Aviation Services, Inc
- Registered owner: Cascade Aviation Services, Inc
- Departed: CVO, CORVALLIS, OR
- Destination: 3S2, AURORA, OR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 23; student; medical: class 3, valid medical--no waivers/lim.; flight hours: 32 total, 28 in this make and model, 5 as pilot in command, 14 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °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 19911013046009A](https://openairdocs.org/incident/19911013046009A), Oct 13, 1991: Cessna 150M, Woodburn, OR, Substantial damage. Rough engine,partial power loss. Landed rough field. Nose gear folded. Nosed over. NR2 exhaust valve seized.

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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