# NTSB CHI86FA098: Mitsubishi MU-2B-60, N513DC, Eola, IL, March 5, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: March 5, 1986, 17:06 local (23:06 UTC)
- Place: Eola, IL
- Coordinates: 41.779075, -88.239936 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.7791&lon=-88.2399&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 5 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13246
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86FA098
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13246/pdf
- Page: https://openairdocs.org/ntsb/CHI86FA098

## Sequence of events

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

- Loss of control - in flight, cruise
  - aircraft handling - not maintained, pilot in command (cause)
  - fatigue(flight and ground schedule), pilot in command (contributing factor)
  - throttle/power control - improper use of, pilot in command (contributing factor)
  - trim setting - improper, pilot in command (contributing factor)
  - weather condition - icing conditions (contributing factor)
  - weather condition - turbulence (contributing factor)
  - stall/spin

## Analysis

EVIDENCE SHOWS CO-PILOT CALLED, 'MAYDAY, UNCONTROLLED SPIN' AFTER ACFT RADAR TRACK SHOWED DECEL FROM 180 TO 120 KTS OVER 2 MIN PERIOD WHILE MAINTAINING CONSTANT 4000 FT CRZ ALT.  CONSTANT ALT CONSISTENT WITH AUTOPILOT/AUTOTRIM USE, PARTICULARLY IN VIEW OF REPORTED TURBULENCE/ICING.  ELEV TRIM FOUND AT APPROX 13 DEG NOSE UP.  NO EVIDENCE FOUND OF PREIMPACT FAILURE OR MALFUNCTION IN ACFT PWRPLANTS, STRUCTURE OR SYSTEMS. EVIDENCE SUGGESTS SCENARIO OF CREW INATTENTION AFTER PWR REDUCTION WITH AUTOPILOT ALTITUDE SETTING.  ON PWR APPLICATION, ACFT PITCHED UP FROM SLOW SPEED INTO UNCONTROLLED FLIGHT.  DUTY DAY AT TIME OF MISHAP APPROACHING 11 HOURS.

## Aircraft

- Registration: [N513DC](https://openairdocs.org/deregistered/N513DC-2014-12-17), registration cancelled 2014-12-17, S/N 1513 S.A. (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: 1513 SA
- Airframe hours: 1184
- Engines: GARRETT TPE331-10501M 778 horsepower turbo prop
- Damage: Destroyed
- Fire: On-Ground
- Flight: Business, Part 91
- Registered owner: Air Hi Ho, Inc.
- Last inspection: 100 hour, February 24, 1986
- Departed: CGX, CHICAGO, IL
- Destination: DPA, WEST CHICAGO, IL
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; 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: 4,590 total, 180 in this make and model, 4,500 as pilot in command, 11 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 280° at 15 knots
- Visibility: 1 statute miles
- Lowest ceiling: 300 ft
- Temperature: 34 °F
- Altimeter: 29.00 inHg
- Observed at: DPA, 10 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 19860305005329A](https://openairdocs.org/incident/19860305005329A), Mar 5, 1986: Mtsbsi MU2B60, Eola, IL, Destroyed, 3 fatal. Aircraft impacted terrain out of control. Pilot reported they were in a spin. Suspect icing fouled control system.

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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