FTW83LA297

NTSB accident investigation · Bell 206L-1 · Lafayette, LA · June 27, 1983

Accident · No injuriesLimited investigationFinal report
Date
June 27, 1983, 09:00 local (14:00 UTC)
Place
Lafayette, LA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N3904LBell 206L-1
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19830627027109A
Case key
20948

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

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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(partial) - mech failure/malfClimb - to cruise
Throttle/power lever,linkage - movement restrictedCause
Maintenance,adjustment - improperCompany maintenance personnelCause
Throttle/power lever,linkage - binding(mechanical)Cause
Throttle/power lever,linkage - penetratedCause
Forced landingLanding - flare/touchdown
Terrain condition - softFactor
Precautionary landing - attemptedPilot in commandFactor
Autorotation - performedPilot in commandFactor
Rotor rpm - not maintainedPilot in commandCause
Flare - misjudgedPilot in commandCause

Analysis

The helicopter made a hard precautionary landing after the plt noted the rotor RPM and N2 would bleed off when collective pitch was increased to 80 percent torque. The plt returned to the arpt and elected to autorotate instead of landing with power available. The autorotation resulted in a hard landing. The power loss was found to be caused by failure of the full control lever to open fully. This was the result of a mechanic overtighting the throttle linkage when a plt complained of throttle creeping open. This creeping is considered normal on a bell 206L-1 according to the operator.

Aircraft

Registration
N3904L
Reported as
Bell 206L-1
Category
Helicopter
Serial number
45597
Airframe hours
2,702
Engine
Allison 250C-28, 435 horsepower, turbo shaft
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Petroleum Helicopters, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · June 24, 1983 · 1 hours before
Destination
High Island, GM
Flight plan
Company VFR
Airport
LFT · Municipal

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
29
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
2,993 total · 1,274 in this make and model · 2,635 as pilot in command · 121 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
150° at 9 knots
Visibility
5 statute miles
Lowest ceiling
2,000 ft broken
Temperature
84 °F, dew point 79 °F
Altimeter
29.00 inHg
Observed at
LFT

FAA reports on this event · 1

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