# NTSB ATL86LA073: Cessna U206B, N3403L, Columbia, TN, February 11, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 11, 1986, 16:20 local (22:20 UTC)
- Place: Columbia, TN
- Coordinates: 35.620185, -87.040061 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.6202&lon=-87.0401&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 7065
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL86LA073
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7065/pdf
- Page: https://openairdocs.org/ntsb/ATL86LA073

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - preflight planning/preparation - inadequate, pilot in command (contributing factor)
  - flight control,aileron - flutter
  - ice/frost removal from aircraft - disregarded, pilot in command (cause)
  - flt control syst,aileron control - lack of
  - wing - failure,partial
- Forced landing, descent - emergency
- Nose gear collapsed, landing - roll

## Analysis

SOON AFTER DEPARTURE THE PLT EXPERIENCED A SEVERE VIBRATION THROUGHOUT THE ACFT. ENG PWR WAS RETARDED AND THE VIBRATION SUBSIDED. THE PLT THEN NOTICED AILERON CONTROL PROBLEMS AND NOTICED THE LEFT WING TIP WAS MOVING UP AND DOWN. AN EMERGENCY LANDING WAS MADE IN A FIELD. INVESTIGATION REVEALED BOTH AILERONS HAD OVERTRAVELED AND WERE BENT. THE LEFT WING MAIN STRUCTURE WAS FOUND FRACTURED BUT HAD NOT SEPARATED. LINE SERVICE PERSONNEL REPORTED THAT THE ACFT DEPARTED WITH ONE HALF INCH OF SOLID ICE ON THE TOP SURFACES OF THE WING.

## Aircraft

- Registration: N3403L (not matched to a registry record)
- Reported make and model: CESSNA U206B
- Category: Airplane
- Serial number: U206-0703
- Airframe hours: 2896
- Engines: CONTINENTAL IO-520-F 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Joseph P. Mc Kee
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 3, 1985, 64 hours before
- Departed: BNA, NASHVILLE, TN
- Destination: MIO, COLUMBIA, TN

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,560 total, 366 in this make and model, 1,391 as pilot in command, 35 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: 2,500 ft broken
- Temperature: 25 °F, dew point 16 °F
- Altimeter: 30.00 inHg
- Observed at: BNA, 32 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 19860211002609A](https://openairdocs.org/incident/19860211002609A), Feb 11, 1986: Cessna U206B, Columbia, TN, Substantial damage. Severe vibration in flight. Crash landed. Left aileron and stall fence came loose,wrinkled wing. Ice on top of wing.

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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