# NTSB MKC84LA064: Mitsubishi MU 2B-20, N123AX, Ames, IA, January 24, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 24, 1984, 10:55 local (16:55 UTC)
- Place: Ames, IA
- Coordinates: 42.020889, -93.620437 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.0209&lon=-93.6204&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): 33622
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA064
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33622/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA064

## 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
  - terrain condition - icy (contributing factor)
  - wrong runway - selected, pilot in command (cause)
  - terrain condition - snow covered (contributing factor)
  - airspeed - improper, pilot in command (cause)
  - weather condition - crosswind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - not corrected, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - snowbank (contributing factor)
  - landing gear - overload

## Analysis

THE ACFT LANDED IN A CROSSWIND ON A SNOW AND ICE COVERED RWY. DURING LANDING, DIRECTIONAL CONTROL WAS LOST AND THE ACFT COLLIDED WITH A SNOWBANK. THE PLT STATED HE ATTEMPTED TO USE PROPELLER REVERSING FOR BRAKING AND THE ACFT STARTED TO SLIDE TO THE LEFT.

## Aircraft

- Registration: N123AX (not matched to a registry record)
- Reported make and model: MITSUBISHI MU 2B-20
- Category: Airplane
- Serial number: 220
- Engines: AIRESEARCH TPE331-1-151A 665 horsepower turbo prop
- Damage: Substantial damage
- Flight: Executive/Corporate, Part 91
- Registered owner: Astec Industries, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, December 21, 1983, 46 hours before
- Departed: CHA, CHATTANOOGA, TN
- Flight plan: IFR
- Airport: AMW, Municipal, runway 13, 3,500 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 10,785 total, 327 in this make and model, 8,305 as pilot in command, 118 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 25 °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 19840124001469A](https://openairdocs.org/incident/19840124001469A), Jan 24, 1984: Mtsbsi MU2B20, Ames, IA, Substantial damage. Aircraft slid off runway during landing on ice covered runway. Pilot stated he should have landed elsewhere.

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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