FTW90DPJ05

NTSB accident investigation · Bell 47G-4A · Bixby, OK · April 14, 1990

Accident · Minor injuriesFinal report
Date
April 14, 1990, 13:15 local (18:15 UTC)
Place
Bixby, OK
Injuries
1 minor
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N2238WBell 47G-4A
Weather
Visual (VMC) · Day
Status
Completed · report September 21, 1992
Report
Approved by Office Director
FAA report
19900414009099A
Case key
22954

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

On this page

Probable cause

Loss of control due to undetermined mechanical 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.

Airframe/component/system failure/malfunctionManeuvering - aerial application
Misc rotorcraft - failure,partialCause
Reason for occurrence undetermined
Loss of control - in flightManeuvering - aerial application
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - crop
Terrain condition - ground
Fire/explosionOther

Analysis

After the ag pilot finished his load, he headed back to the truck for his final load. As he passed under a powerline he heard a loud bang or pop, and the helicopter yawed to the right. He said he heard the wheat hitting the skid booms, and then the helicopter impacted hard on the toes of the skids. His seat belt failed and he was thrown through the front of the helicopter. He said he received minor injuries. The helicopter was demolished by impact and post-impact fire. The FAA investigators said that due to the damae caused by the impact, damaged caused by the fire, and damage caused by movement of the wreckage, they could not find a component failure that might have caused the accident. The first skid marks started under the powerlines, but the power lines were not damaged.

Aircraft

Registration
N2238W
Reported as
Bell 47G-4A
Category
Helicopter
Serial number
7704
Airframe hours
4,406
Engine
Lycoming VO 540, 220 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Aerial application · Part 137
Registered owner
Cristopher Bailey
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · May 11, 1989 · 231 hours before
Departed
NONE · Bixby, OK
Destination
Bixby, OK
Airport
NONE

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
32
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,300 total · 1,400 in this make and model · 2,000 as pilot in command · 70 in the last 90 days · 50 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
15 statute miles
Lowest ceiling
None
Temperature
64 °F

FAA reports on this event · 1

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

Other investigations on N2238W · 2

Matched to the same aircraft by N-number and date.