# NTSB DEN83LA017: Mitsubishi MU-2B-60, N274MA, Englewood, CO, November 11, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 11, 1982, 16:36 local (23:36 UTC)
- Place: Englewood, CO
- Coordinates: 39.579113, -104.859893 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5791&lon=-104.8599&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 11, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70604
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LA017
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70604/pdf
- Page: https://openairdocs.org/ntsb/DEN83LA017

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, takeoff - roll/run
  - weather condition - tailwind
  - airport facilities,runway/landing area condition - slush covered (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - miscellaneous - frozen (cause)
- Loss of control - in flight, takeoff
  - aborted takeoff - initiated, pilot in command
  - reversers - selected, pilot in command
  - directional control - not maintained, pilot in command
  - ground loop/swerve - uncontrolled, pilot in command
  - propeller feathering - initiated, pilot in command

## Analysis

THE AIRCRAFT WAS BEING REPOSITIONED FOR AN AIR TAXI OPERATION. THE PILOT BEGAN TAKING OFF ON A SLUSH COVERED RUNWAY. HE REPORTED THAT AS THE AIRCRAFT ACCELERATED, THE NOSEWHEEL BEGAN TO SLING WATER AND SLUSH OFF THE RUNWAY AND ONTO THE WINDSHIELD. HE RAISED THE NOSEWHEEL SLIGHTLY TO ELIMINATE THIS DISTRACTION. AT ABOUT THAT POINT, THE AIRCRAFT SWERVED TO THE RIGHT. REPORTEDLY, THE PILOT IMMEDIATELY MOVED BOTH POWER LEVERS BACK TO THE REVERSE TO ABORT. THE AIRCRAFT THEN SWERVED ABRUPTLY TO THE LEFT, BUT CONTINUED OFF THE RIGHT SIDE OF THE RUNWAY AND WENT DOWN AN EMBANKMENT. THE PILOT BROUGHT BOTH CONDITION LEVERS BACK TO THE EMERGENCY SHUT-OFF POSITION AS THE PLANE SKIDDED OFF THE RUNWAY. FROZEN SLUSH WAS FOUND ON THE AIRFRAME. A GRAYISH-WHITE RESIDUE, POSSIBLY FROM EVAPORATED WATER/STEAM WAS NOTED INSIDE THE EXHAUST STACK OF THE RIGHT ENG. BOTH PROP FEATHER VLVS WERE FOUND OPEN, BOTH ENG SHUT- OFF VLVS WERE CLOSED, BOTH PROP LATCH PINS WERE ENGAGED, BUT THE LEFT PROP WAS FEATHERED & THE RIGHT WAS IN FLAT PITCH.

## Aircraft

- Registration: [N274MA](https://openairdocs.org/deregistered/N274MA-1991-03-13), registration cancelled 1991-03-13, S/N 786SA (OpenAirDocs)
- Reported make and model: MITSUBISHI MU-2B-60
- Registry model: [Mitsubishi MU-2B-60](https://openairdocs.org/model/mitsubishi-mu-2b-60) (registry code 5780460) (OpenAirDocs)
- Category: Airplane
- Serial number: 786SA
- Airframe hours: 1288
- Engines: AIRESEARCH TPE-33110501M 778 horsepower turbo prop
- Damage: Substantial damage
- Flight: Part 91
- Operator: International Jet Aviation Ser
- Registered owner: 274ma Association
- Departed: APA, ENGLEWOOD, CO
- Destination: DEN, DENVER, CO
- Airport: APA, Arapahoe County, runway 10, 4,900 × 62 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; flight instructor, airline transport, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 11,115 total, 2,000 in this make and model, 10,739 as pilot in command, 130 in the last 90 days, 32 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: 5,000 ft broken
- Altimeter: 29.00 inHg
- Observed at: APA

## 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 19821111057909A](https://openairdocs.org/incident/19821111057909A), Nov 11, 1982: Mtsbsi MU2B60, Englewood, CO, Substantial damage. Pilot lost control of aircraft during takeoff roll. Aircraft skidded off runway causing substantial damage.

## Other investigations on N274MA (1)

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 FTW91FA043](https://openairdocs.org/ntsb/FTW91FA043), Feb 22, 1991: Mitsubishi MU-2B-60 (N274MA), Tulsa, OK, destroyed, 3 fatal. Probable cause: THE SHUTDOWN OF ONE ENGINE FOR UNDETERMINED REASONS, AND THE PILOT'S FAILURE TO MAINTAIN VMCA DURING A CRITICAL PHASE OF FLIGHT. A FACTOR IN THE ACCIDENT WAS THE PILOT'S IMPROPER EMERGENCY PROCEDURE.

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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