# NTSB SEA89LA161: Cessna 172P, N98354, Alderwood Manor, WA, September 4, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 4, 1989, 16:40 local (23:40 UTC)
- Place: Alderwood Manor, WA
- Coordinates: 47.799091, -122.280792 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.7991&lon=-122.2808&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 16, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41069
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89LA161
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41069/pdf
- Page: https://openairdocs.org/ntsb/SEA89LA161

## Probable cause

IMPROPER PLANNING/DECISION BY THE PILOT.  THE TAILWIND AND HIGH OBSTRUCTIONS WERE RELATED FACTORS.

## Sequence of events

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

- Overrun, landing - roll
  - planning/decision - improper, pilot in command (cause)
  - weather condition - tailwind (contributing factor)
  - terrain condition - high obstruction(s) (contributing factor)
- On ground/water collision with object, landing

## Analysis

THE ACCIDENT OCCURRED WHEN THE PILOT LANDED DOWNWIND ON A 1689 FT RUNWAY.  SUBSEQUENTLY, THE AIRCRAFT WENT OFF THE DEPARTURE END OF THE RUNWAY AND HIT A TREE AND A BOAT.  THE AIRPORT DATA WARNED OF 'TREE RWY 16; BUILDING RWY 34.'

## Aircraft

- Registration: [N98354](https://openairdocs.org/aircraft/N98354), registered now, S/N 17276282, built 1984 (OpenAirDocs)
- Reported make and model: CESSNA 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17276282
- Engines: LYCOMING O-320 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Steve Lee, doing business as Wings Aloft
- Registered owner: Unknown
- Departed: BFI, SEATTLE, WA
- Destination: S13
- Airport: S13, Martha Lake, runway 16, 1,689 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 90 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 8 knots
- Visibility: 50 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: -0 °F, dew point -0 °F
- Observed at: PAE

## 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 19890904033629A](https://openairdocs.org/incident/19890904033629A), Sep 4, 1989: Cessna 172P, Alderwood Manor, WA, Substantial damage. Landed downwind, struck a tree and a boat after overrunning the runway.

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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