# NTSB SEA83LA200: Maule M-4, N4623T, Monroe, WA, September 3, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 2, 1983, 17:00 local (Sep 3, 1983, 00:00 UTC)
- Place: Monroe, WA
- Coordinates: 47.870315, -121.879699 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.8703&lon=-121.8797&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39769
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA200
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39769/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA200

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - supervision - inadequate, pilot in command (cause)
  - directional control - not maintained, copilot/second pilot (cause)
  - ground loop/swerve - inadvertent, copilot/second pilot (cause)
  - lack of familiarity with aircraft, copilot/second pilot (contributing factor)

## Analysis

THE PLT REPORTED THAT HE WAS PRACTICING TOUCH-AND-GO LANDINGS WITH A FRIEND THAT WAS A CERTIFIED FLT INSTRUCTOR (CFI). AFTER A LANDING, THE FRIEND INDICATED HIS DESIRE TO FLY THE ACFT. THE PLT OFFERED TO LET HIS FRIEND FLY IT FROM THE LEFT SEAT. THE FRIEND DECLINED THE OFFER TO CHANGE SEATS, BUT DID TAKE THE CONTROLS FOR TAKEOFF. DURING THE TAKEOFF ROLL, DIRECTIONAL CONTROL WAS LOST. THE ACFT WENT OFF THE RWY, THE MAIN GEAR ENCOUNTERED TALL GRASS, AND THE ACFT NOSED OVER.

## Aircraft

- Registration: [N4623T](https://openairdocs.org/aircraft/N4623T), registered now, S/N 91 (OpenAirDocs)
- Reported make and model: MAULE M-4
- Registry model: [Maule M-4](https://openairdocs.org/model/maule-m-4) (registry code 5460104) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 91
- Engines: CONTINENTAL O-300-A 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: William Bump
- Airworthiness certificate: Standard, Normal
- Departed: WA38, MONROE, WA
- Airport: WA38, Flying F Ranch, runway 25, 2,100 × 34 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 170 total, 5 in this make and model, 120 as pilot in command, 1 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 3 knots
- Visibility: 15 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 73 °F, dew point 54 °F
- Altimeter: 30.00 inHg
- Observed at: BFI, 28 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 19830902048869A](https://openairdocs.org/incident/19830902048869A), Sep 2, 1983: Maule M4, Monroe, WA, Substantial damage. Pilot lost directional control during takeoff. Aircraft rolled into high grass and flipped inverted.

## Other investigations on N4623T (3)

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 ANC99LA152](https://openairdocs.org/ntsb/ANC99LA152), Sep 24, 1999: Maule ML-4 (N4623T), Anchorage, AK, substantial damage. Probable cause: The improper (reversed) connection of the elevator control cables by the owner/pilot-mechanic, and the failure to have the installation inspected by another mechanic.
- [NTSB ANC90LA081](https://openairdocs.org/ntsb/ANC90LA081), Jun 1, 1990: Maule M4 (N4623T), L. Susitna Riv, AK, substantial damage. Probable cause: THE PILOT'S FUEL MISMANAGEMENT IN NOT HAVING SUFFICIENT FUEL TO REACH HIS DESTINATION.
- [NTSB DEN79DTE39](https://openairdocs.org/ntsb/DEN79DTE39), May 26, 1979: Maule M-4 (N4623T), Englewood, CO, 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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