CHI90IA181

NTSB incident investigation · Bell 206A · Lake Ozark, MO · July 19, 1990

Incident · No injuriesIncident investigationFinal report
Date
July 19, 1990, 13:15 local (18:15 UTC)
Place
Lake Ozark, MO
Injuries
4 uninjured
Damage
Minor damage
Phase of flight
Initial climb
Aircraft
N206ATBell 206A
Weather
Visual (VMC) · Day
Status
Completed · report December 30, 1992
Report
Approved by Office Director
FAA report
19900719027489I
Case key
14569

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

Compression assembly blade and emergency floatation gear failure.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - mech failure/malfTakeoff - initial climb
Compressor assembly,blade - failure,totalCause
Forced landingDescent - emergency
In flight collision with terrain/waterLanding
Terrain condition - waterFactor
Misc rotorcraft,emergency floatation gear - failure,totalCause

Analysis

Shortly after lift-off, over water, the helicopter's engine failed. An emergency landing was attempted on the water, but the emergency inflatable floats failed to deploy. The acft sank, but all four occupants escaped without injury. The helicopter sustained only minor damage. Post accident investigation revealed the compressor blades, after the first stage, had failed.

Aircraft

Registration
N206AT
Reported as
Bell 206A
Category
Helicopter
Serial number
504
Engine
Allison 250-C20, 317 horsepower, turbo shaft
Damage
Minor damage
Flight
Business · Part 91
Operator
Ozark Helicopter

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
33
Certificate
Airline transport
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
3,780 total · 2,105 in this make and model · 3,410 as pilot in command · 54 in the last 90 days · 27 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 5 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.