# NTSB SEA86LA164: Maule M-4-220C, N40646, Juneau, AK, July 9, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 8, 1986, 20:30 local (Jul 9, 1986, 04:30 UTC)
- Place: Juneau, AK
- Coordinates: 58.580924, -134.769958 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.5809&lon=-134.7700&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40439
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA164
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40439/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA164

## 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
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)

## Analysis

THE ACFT VEERED LEFT AND GROUND LOOPED DURING LANDING ROLL. THE RIGHT MAIN GEAR STRUT COLLAPSED DURING THE LANDING. THE PLT HAD 5 HOURS TOTAL FLT TIME IN THIS ACFT AND STATED THE TOE BRAKES SEEMED 'TOUCHY' DURING THE LANDING.

## Aircraft

- Registration: [N40646](https://openairdocs.org/aircraft/N40646), registered now, S/N 2162C, built 1972 (OpenAirDocs)
- Reported make and model: MAULE M-4-220C
- Registry model: [Maule M-4-220C](https://openairdocs.org/model/maule-m-4-220c) (registry code 5460114) (OpenAirDocs)
- Registry engine: [Franklin 6V 350 series](https://openairdocs.org/engine/franklin-6v-350-series) (registry code 27043, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2162C
- Airframe hours: 1125
- Engines: FRANKLIN 6A-350-C1 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: William C. Newell
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 2, 1986
- Departed: GST, GUSTAVIS, AK
- Flight plan: VFR
- Airport: JNU, Juneau, runway 8, 8,456 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 141 total, 5 in this make and model, 97 as pilot in command, 5 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: 7,000 ft broken
- Temperature: 57 °F, dew point 48 °F
- Altimeter: 29.00 inHg
- Observed at: JNU

## 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 19860708041679A](https://openairdocs.org/incident/19860708041679A), Jul 8, 1986: Maule M4220C, Juneau, AK, Substantial damage. The aircraft ground looped on landing rollout. Pilot admits he misapplied the brakes.

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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