# NTSB MKC89LA178: Bell 206B, N43BL, Marys Home, MO, August 11, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 11, 1989, 11:30 local (16:30 UTC)
- Place: Marys Home, MO
- Coordinates: 38.350685, -92.570983 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.3507&lon=-92.5710&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report August 22, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 34847
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA178
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34847/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA178

## Probable cause

THE FAILURE OF THE PILOT TO MAINTAIN CONTROL OF THE HELICOPTER.

## Sequence of events

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

- Roll over, takeoff
  - terrain condition - open field
  - aircraft control - not maintained, pilot in command (cause)

## Analysis

THE PLT SAID HE WAS INCREASING POWER FOR TAKEOFF, AND HAD ATTAINED ABOUT 38-42%. THE HELICOPTER WAS BECOMING LIGHT ON THE SKIDS, THEN ROLLED OVER ON IT'S RIGHT SIDE. THE HELICOPTER HAD LANDED IN A LEVEL FIELD. POST ACCIDENT INVESTIGATION REVEALED NO MALFUNCTION OF THE FLIGHT CONTROLS NOR ANY OTHER MECHANICAL MALFUNCTION. IN HIS REPORT THE PILOT ALSO STATED THERE WERE NO MALFUNCTIONS IN THE HELICOPTER.

## Aircraft

- Registration: [N43BL](https://openairdocs.org/deregistered/N43BL-1990-11-06), registration cancelled 1990-11-06, S/N 3964 (OpenAirDocs)
- Reported make and model: BELL 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511) (OpenAirDocs)
- Category: Helicopter
- Serial number: 3964
- Engines: ALLISON 250-C20J 420 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Brown Aviation
- Registered owner: Brown Aviation, Inc
- Departed: MO07, LAKE OZARK, MO
- Airport: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; airline transport, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane, helicopter; medical: class 2, valid medical--no waivers/lim.; flight hours: 8,133 total, 140 in this make and model, 7,626 as pilot in command, 140 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Observed at: JEF, 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 19890811029199A](https://openairdocs.org/incident/19890811029199A), Aug 11, 1989: Bell 206B, Mary'S Home, MO, Substantial damage. Got light on the skids for liftoff. Rolled on its side.

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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