# NTSB SEA89LA125: Maule M4-210, N4744T, Lopez, WA, June 28, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 28, 1989, 16:20 local (23:20 UTC)
- Place: Lopez, WA
- Coordinates: 48.4906, -122.869552 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.4906&lon=-122.8696&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 24, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 41042
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89LA125
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41042/pdf
- Page: https://openairdocs.org/ntsb/SEA89LA125

## Probable cause

THE PILOT DID NOT MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE LANDING ROLL.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - ground loop/swerve - not corrected, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE AIRCRAFT GROUND LOOPED DURING LANDING GROUND ROLL, RESULTING IN SUBSTANTIAL DAMAGE TO BOTH WINGS AND THE LANDING GEAR.

## Aircraft

- Registration: [N4744T](https://openairdocs.org/aircraft/N4744T), registered now, S/N 1010, built 1964 (OpenAirDocs)
- Reported make and model: MAULE M4-210
- Registry model: [Maule M-4-210](https://openairdocs.org/model/maule-m-4-210) (registry code 5460108) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1010
- Engines: CONTINENTAL IO-360-A 210 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Methow Aviation, Inc.
- Departed: PAE, EVERETT, WA
- Airport: S31, Lopez Island, runway 16, 2,900 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 18,000 total, 10 in this make and model, 16,000 as pilot in command, 10 in the last 90 days, 20 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 8 knots
- Visibility: 7 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: -0 °F, dew point -0 °F
- Observed at: NUW, 15 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 19890628018369A](https://openairdocs.org/incident/19890628018369A), Jun 28, 1989: Maule M4210, Lopez, WA, Substantial damage. Ground looped after landing.

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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