FTW84LA282

NTSB accident investigation · Bell 47G-5A · Houma, LA · June 21, 1984

Accident · Minor injuriesLimited investigationFinal report
Date
June 21, 1984, 16:15 local (21:15 UTC)
Place
Houma, LA
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N14807Bell 47G-5A
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840621029389A
Case key
21377

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/malfCruise - normal
Fuel system,fuel control - failure,partialCause
Forced landingLanding - flare/touchdown
Object - tree(s)Factor
Autorotation - performedPilot in commandFactor
Terrain condition - none suitableFactor
Terrain condition - softFactor

Analysis

The helicopter autorotated into trees and marsh land after a partial loss of power. The acft was on a pipeline patrol atlow alt at the time of the power loss. Examination of the engine after the accident revealed that the fuel control governor spring, p/n 2529242, had broken driving the fuel control to idle.

Aircraft

Registration
N14807
Reported as
Bell 47G-5A
Category
Helicopter
Serial number
2505A
Airframe hours
6,323
Engine
Allison 250-C20B, 274 horsepower, turbo shaft
Damage
Substantial damage
Flight
Aerial observation · Part 91
Registered owner
Industrial Helicopters Inc.
Airworthiness certificate
Standard, Utility
Departed
Houma, LA

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
37
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
13,600 total · 4,550 in this make and model · 13,600 as pilot in command · 194 in the last 90 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 7 knots
Lowest ceiling
4,000 ft broken
Temperature
88 °F, dew point -0 °F
Altimeter
30.00 inHg
Observed at
HUM, 2 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.