# NTSB SEA91LA045: Cessna C-150L, N5437Q, Alderwood Manor, WA, January 22, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 21, 1991, 17:55 local (Jan 22, 1991, 01:55 UTC)
- Place: Alderwood Manor, WA
- Coordinates: 47.799205, -122.280212 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.7992&lon=-122.2802&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41384
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA045
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41384/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA045

## Probable cause

THE FAILURE OF THE PILOT IN COMMAND TO ATTAIN PROPER CLEARANCE FROM TERRAIN.  A FACTOR RELATING TO THIS ACCIDENT WAS THE NIGHT LIGHT CONDITIONS.

## Analysis

THE ACFT IMPACTED TREES OFF THE END OF THE RUNWAY DURING INITIAL CLIMB AFTER TAKEOFF ON A NIGHT STUDENT TRAINING FLIGHT.

## Sequence of events

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

- In flight collision with terrain/water, takeoff - initial climb
  - light condition - night (contributing factor)
  - clearance - not attained, pilot in command (cause)

## Aircraft

- Registration: [N5437Q](https://openairdocs.org/aircraft/N5437Q), registered now, S/N 15073337, built 1972 (OpenAirDocs)
- Reported make and model: CESSNA C-150L
- Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 150  73337
- Engines: CONTINENTAL O-200 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Dorothy S. Hauter, doing business as Martha Lake Airport
- Registered owner: Dorothy S. Hauter
- Departed: S13, ALDERWOOD MANOR, WA
- Airport: S13, Martha Lake, runway 34, 1,689 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, invalid medical for flight; flight hours: 750 total, 300 in this make and model, 5 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 41 °F, dew point 30 °F
- Observed at: PAE, 4 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 19910121000789A](https://openairdocs.org/incident/19910121000789A), Jan 21, 1991: Cessna 150L, Alderwood Manor, WA, Substantial damage. Struck trees and crashed during night takeoff. Flaps full down after accident. CFI medical and biennial not current

## Other investigations on N5437Q (1)

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.

- [NTSB SEA87LA081](https://openairdocs.org/ntsb/SEA87LA081), Apr 15, 1987: Cessna 150L (N5437Q), Alderwood, WA, substantial damage

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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