# NTSB LAX82FA255: Mitsubishi MU-2B, N27GP, Schellville, CA, July 14, 1982

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: July 13, 1982, 17:45 local (Jul 14, 1982, 00:45 UTC)
- Place: Schellville, CA
- Coordinates: 38.239933, -122.460235 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.2399&lon=-122.4602&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report July 13, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72570
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX82FA255
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72570/pdf
- Page: https://openairdocs.org/ntsb/LAX82FA255

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - roll/run
  - fuel system,fuel control - failure,partial (cause)
  - fuel system,fuel control - leak (cause)
  - propeller system/accessories - engaged (cause)
  - propeller - improper use of, pilot in command (cause)
  - performance data - not identified, pilot in command (cause)
- Loss of control - on ground/water, takeoff - roll/run
  - directional control - not maintained, pilot in command (contributing factor)
  - ground loop/swerve - inadvertent, pilot in command
- On ground/water encounter with terrain/water, takeoff
  - aborted takeoff - performed, pilot in command
  - terrain condition - ditch (contributing factor)
- Nose over, takeoff

## Analysis

AT APPROXIMATELY 800 FT DOWN THE LEFT SIDE OF THE RWY THE LEFT ENG EXPERIENCED A POWER LOSS. THE ACFT SWERVED OFF THE LEFT SIDE OF THE RWY COLLIDING WITH A DRAINAGE DITCH & COMING TO REST INVERTED. EXAMINATION OF THE FUEL CONTROL UNIT REVEALED THAT THE BELLOWS WITHIN THE ASSEMBLY WERE FOUND IN AN EXTENDED POSITION, INDICATING A LEAK INTO THE EVACUATED AREA. A FAILURE WAS NOTED AT THE SEAM IN THE BELLOWS. IN ADDITION, EXAMINATION OF THE PROPELLER REVEALED THAT THE START LOCKS WERE ENGAGED & THE BLADES WERE AT THE START LOCK POSITION AT IMPACT. IN ORDER TO ENGAGE THE START LOCKS, THE POWERLEVER HAS TO BE MOVED TO REVERSE DURING SHUTDOWN WITH THE ENG RPM BELOW 50%. AFTER ENG START THE PLT MUST AGAIN RETARD THE POWER LEVERS TO REVERSE TO DISENGAGE THE START LOCKS. THE LOCKS WILL NOT DISENGAGE AFTER THE POWER LEVER IS SET TO THE FLIGHT RANGE.

## Aircraft

- Registration: [N27GP](https://openairdocs.org/deregistered/N27GP-2013-06-04), registration cancelled 2013-06-04, S/N 027, built 1967 (OpenAirDocs)
- Reported make and model: MITSUBISHI MU-2B
- Registry model: [Mitsubishi MU-2B](https://openairdocs.org/model/mitsubishi-mu-2b) (registry code 5780404) (OpenAirDocs)
- Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 027
- Airframe hours: 2254
- Engines: AIRESEARCH TPE 331-25AA 575 horsepower turbo prop
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Robert Marshall Jr.
- Registered owner: Robert Marshall Jr.
- Departed: 0Q3, SCHELLVILLE, CA
- Destination: OAK, OAKLAND, CA
- Airport: 0Q3, Schellville, runway 7, 2,900 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 6,500 total, 134 in this make and model, 6,300 as pilot in command, 150 in the last 90 days, 29 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 8 knots
- Visibility: 20 statute miles
- Temperature: 176 °F
- Altimeter: 29.00 inHg

## 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 19820713032119A](https://openairdocs.org/incident/19820713032119A), Jul 13, 1982: Mtsbsi MU2B, Schellville, CA, Substantial damage. Lost partial power on left engine on takeoff. Lost control. Prop in start locks. Fuel control bellows leaking.

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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