# NTSB CHI92LA047: Beech B36TC, N6930C, Mt Pleasant, MI, December 5, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 5, 1991, 14:30 local (19:30 UTC)
- Place: Mt Pleasant, MI
- Location: 43.5967° N, 84.7760° W: Placed by OpenAirDocs: center of Mount Pleasant, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.5967&lon=-84.7760&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 8, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15362
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA047
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15362/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA047

## Probable cause

WATER IN THE FUEL, AND AN INADEQUATE PREFLIGHT BY THE PILOT.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, approach
  - fluid,fuel - water (cause)
  - aircraft preflight - inadequate, pilot in command (cause)
- Forced landing, descent - emergency
- In flight collision with object, landing
  - object - tree(s)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT SAID THAT AFTER BEING CLEARED FOR AN IFR APPROACH, THE ENGINE LOST POWER.  DURING AN EMERGENCY LANDING, THE AIRCRAFT STRUCK A TREE AND LOST PART OF THE RIGHT WING.  THE AIRCRAFT THEN SLID TO A STOP WITH NO INJURIES TO THE PILOT OR PASSENGER.  A POST-ACCIDENT EXAMINATION REVEALED THE PRESENCE OF WATER IN THE FLOW DIVIDER WHICH (BY THAT TIME) HAD FROZEN.

## Aircraft

- Registration: [N6930C](https://openairdocs.org/aircraft/N6930C), registered now, S/N EA-420, built 1984 (OpenAirDocs)
- Reported make and model: BEECH B36TC
- Registry model: [Beech B36TC](https://openairdocs.org/model/beech-b36tc) (registry code 1151609) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: EA-420
- Airframe hours: 932
- Engines: CONTINENTAL TSIO-520-UB 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Strong Manufacturing Co.
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, January 30, 1991, 142 hours before
- Departed: AUG, AUGUSTA, ME
- Destination: MOP, MT PLEASANT, MI
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,335 total, 431 in this make and model, 1,238 as pilot in command, 75 in the last 90 days, 16 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 120° at 9 knots
- Lowest ceiling: 500 ft
- Temperature: 16 °F, dew point 12 °F
- Observed at: MBS, 20 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 19911205054639A](https://openairdocs.org/incident/19911205054639A), Dec 5, 1991: Beech B36TC, Mount Pleasant, MI, Substantial damage. Lost engine power on appraoch. Forced landing. Hit tree in wooded area. Water frozen in fuel flow divided.

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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