# NTSB SEA84LA189: Mooney M20E, N5566Q, Scappoose, OR, July 29, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 29, 1984, 16:30 local (23:30 UTC)
- Place: Scappoose, OR
- Coordinates: 45.799781, -122.970375 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.7998&lon=-122.9704&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39981
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA189
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39981/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA189

## Sequence of events

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

- Gear collapsed, landing
  - landing gear,normal retraction/extension assembly - worn (cause)
  - landing gear,gear indicating system - false indication (contributing factor)

## Analysis

PLT LOWERED GEAR IN TRAFFIC PATTERN AND GEAR DOWN AND LOCKED GREEN LIGHT WAS RECEIVED. PLT FAILED TO CHECK THE GEAR BAR INDICATOR. ACFT TOUCHED DOWN WITH GEAR EXTENDED 1/4 OF THE WAY. INSPECTION REVEALED LANDING GEAR MOTOR BEARINGSWERE WORN OUT.

## Aircraft

- Registration: [N5566Q](https://openairdocs.org/deregistered/N5566Q-2015-01-05), registration cancelled 2015-01-05, S/N 636, built 1965 (OpenAirDocs)
- Reported make and model: MOONEY M20E
- Registry model: [Mooney M20E](https://openairdocs.org/model/mooney-m20e) (registry code 5870212) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 63G
- Airframe hours: 2076
- Engines: LYCOMING IO-360-A1A 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Daniel J. Cyr
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, December 30, 1984, 25 hours before
- Departed: BLI, BELLINGHAM, WA
- Destination: 1S4, SCAPPOOSE, OR
- Flight plan: VFR
- Airport: 1S4, Scappoose Industrial, runway 33, 4,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 211 total, 136 in this make and model, 193 as pilot in command, 13 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: HIO

## 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 19840729036979A](https://openairdocs.org/incident/19840729036979A), Jul 29, 1984: Mooney M20E, Scappose, OR, Substantial damage. Gear not locked down collapsed on landing. Gear motor had failed due to worn bearings. Failed to confirm gear down.

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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