# NTSB CHI92FA009: Beech A36, N46MJ, Lakeville, MN, October 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: October 14, 1991, 09:25 local (14:25 UTC)
- Place: Lakeville, MN
- Coordinates: 44.670768, -93.240348 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.6708&lon=-93.2403&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report April 23, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15266
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92FA009
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15266/pdf
- Page: https://openairdocs.org/ntsb/CHI92FA009

## Probable cause

THE PILOT-IN-COMMAND'S DECISION TO CONTINUE FLIGHT INTO KNOWN ADVERSE WEATHER. CONTRIBUTING TO THE ACCIDENT WAS THE ENCOUNTER WITH WEATHER CONDITIONS FAVORABLE FOR FORMATION OF AIRFRAME ICING.

## Sequence of events

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

- In flight encounter with weather, climb
  - weather condition - icing conditions (contributing factor)
  - in-flight planning/decision - poor, pilot in command
  - flight into known adverse weather - continued, pilot in command (cause)
- Loss of control - in flight, climb
  - wing - ice
  - ice/frost removal from aircraft - not possible, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT FILED AN IFR FLIGHT PLAN TO CRUISE AT 10,000 FEET.  WHEN HE RECEIVED PILOT REPORTS OF ICING BETWEEN 8,000 FEET AND 11,000 FEET HE REQUESTED AND WAS CLEARED TO CLIMB TO 12,000 FEET.  DURING THE CLIMB HE REPORTED AN INABILITY TO HOLD ALTITUDE AND THE AIRCRAFT BEGAN A DESCENT. DURING THE DESCENT HE REPORTED LOSING CONTROL OF THE AIRCRAFT ON TWO OCCASIONS.  THE AIRCRAFT WAS GIVEN ALTITUDES AND HEADINGS IN AN ATTEMPT TO GET THE AIRPLANE TO AN AIRPORT, HOWEVER THE AIRPLANE IMPACTED IN AN OPEN FIELD AND WAS DESTROYED BY IMPACT AND A PORT-IMPACT FIRE.

## Aircraft

- Registration: [N46MJ](https://openairdocs.org/deregistered/N46MJ-1992-01-06), registration cancelled 1992-01-06, S/N E1427 (OpenAirDocs)
- Reported make and model: BEECH A36
- Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs)
- Category: Airplane
- Serial number: E-1427
- Engines: CONTINENTAL IO-520-BB 285 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Business, Part 91
- Operator: Kirvada General, Inc.
- Registered owner: Kirvada General, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 19, 1991
- Departed: OEO, OSEOLA, WI
- Destination: STJ, ST. JOSEPH, MO
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 68; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 1,325 total, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 17 knots, gusting 22
- Visibility: 12 statute miles
- Lowest ceiling: 2,000 ft broken
- Temperature: 41 °F, dew point 36 °F
- Altimeter: 29.00 inHg
- Observed at: MSP, 15 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 19911014045959A](https://openairdocs.org/incident/19911014045959A), Oct 14, 1991: Beech A36, Lakeville, MN, Destroyed, 2 fatal. Departed in known icing conditions aloft on IFR flight. Lost control after icing problem. Unable sustain flight.

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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