SEA89LA076

NTSB accident investigation · Bell 47G3B2 · Milton-Freewtr, OR · April 29, 1989

Accident · Minor injuriesLimited investigationFinal report
Date
April 29, 1989, 10:30 local (17:30 UTC)
Place
Milton-Freewtr, OR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4072GBell 47G3B2
Weather
Visual (VMC) · Day
Status
Completed · report January 22, 1991
Report
Approved by Office Director
FAA report
19890429010579A
Case key
41002

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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Probable cause

Improper planning/decision by the pilot, which resulted in fuel exhaustion from an inadequate supply of fuel.

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) - nonmechanicalManeuvering - aerial application
Planning/decision - improperPilot in commandCause
Fluid,fuel - exhaustionCause
Fuel supply - inadequatePilot in commandCause
Forced landingManeuvering - turn to landing area (emergency)
Autorotation
Hard landingLanding

Analysis

The plt stated that the eng lost power during a procedure turn-around & that insufficient speed & altitude were available to prevent a hard autorotative landing. During touchdown, the main rotor severed the tailboom. Only about 1/2 gal of fuel was remaining in the intact fuel system.

Aircraft

Registration
N4072G
Reported as
Bell 47G3B2
Category
Helicopter
Serial number
6702
Airframe hours
6,516
Engine
Allison 250-C20, 400 horsepower, turbo shaft
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Gary Knight
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · November 12, 1988 · 106 hours before

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
42
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
7,800 total · 450 in this make and model · 7,400 as pilot in command · 85 in the last 90 days · 70 in the last 30 days · 7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 3 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
64 °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.