FTW89DRD13

NTSB accident investigation · Bell 47G-3B-1 · Rayville, LA · August 22, 1989

Accident · No injuriesFinal report
Date
August 22, 1989, 07:10 local (12:10 UTC)
Place
Rayville, LA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N90463Bell 47G-3B-1
Weather
Visual (VMC) · Day
Status
Completed · report September 5, 1991
Report
Approved by Office Director
FAA report
19890822031279A
Case key
22734

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

Failure of the pilot to maintain sufficient rotor RPM. A factor related to the accident was: the cotton crop.

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.

In flight collision with terrain/waterTakeoff
Rotor rpm - not maintainedPilot in commandCause
Climb - not possible
Terrain condition - cropFactor

Analysis

The plt rprtd that after loading for an aerial application flt, he 'brought the helicopter to a hover to check everything,' then contd the takeoff. He stated that after lift-off, he 'did not have sufficient power' & 'tried to regain r.p.m. but was unable.' The helicopter then moved forward into a 4' high cotton crop & touched down. The plt rprtd that during touchdown, he applied aft cyclic to keep the helicopter from rocking forward. According to him the tail rotor hit the ground, causing it to fail & damage the main rotor. An FAA investigator rprtd that the tail boom was cut off & the tail rotor blades were destroyed.

Aircraft

Registration
N90463
Reported as
Bell 47G-3B-1
Category
Helicopter
Serial number
6669
Engine
Lycoming TVO-435-R1A, 270 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Farmers Flying Service
Registered owner
Farmers Flying Service
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · August 13, 1989 · 22 hours before
Airport
Ag Strip

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
41
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
7,179 total · 420 in this make and model · 6,800 as pilot in command · 300 in the last 90 days · 190 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 3 knots
Visibility
4 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 73 °F
Altimeter
29.00 inHg
Observed at
MLU, 14 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.