MIA98LA230

NTSB accident investigation · Bell 47D1 · Dawson, GA · August 29, 1998

Accident · No injuriesLimited investigationFinal report
Date
August 29, 1998, 10:10 local (14:10 UTC)
Place
Dawson, GA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N4702SBell 47D1
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1999
Report
Approved by Office Director
FAA report
19980829022379A
Case key
43803

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

The pilot's selection of unsuitable terrain for landing resulting in debris being blown up during landing resulting in damage to the tail rotor and loss of control.

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/malfunctionApproach
Terrain condition - loose objects
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Rotor system,tail rotor blade - foreign object damage
Loss of control - in flightApproach - vfr pattern - final approach
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

The pilot stated that as he approached his load truck to land, debris started blowing around and the helicopter suddenly started spinning to the right. He had no tail rotor control when he applied left pedal. He then maneuvered away from the truck and the helicopter crashed to the ground. The tail rotor had been damaged by the flying debris resulting in the loss of control.

Factual narrative

On August 29, 1998, about 1010 eastern daylight time, a Bell 47D1, N4702S, registered to an individual, was damaged during landing at Dawson, Georgia, while on a Title 14 CFR Part 137 aerial application flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft received substantial damage and the commercial-rated pilot was not injured. The flight originated from the accident site, the same day, about 1000.

The pilot stated that he took off from a trailer and flew over the area that was to be sprayed. He then flew back to the staging area. As he approached his load truck to land, debris started blowing around and the helicopter suddenly started spinning to the right. He had no tail rotor control when he applied left pedal. He pulled back on the cyclic control to get away from the truck and the helicopter came to rest on the ground about 100 feet away.

Aircraft

Registration
N4702S
Reported as
Bell 47D1
Category
Helicopter
Serial number
B-101R
Airframe hours
8,692
Engine
Franklin 6V-335-A, 210 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Southern Helicopters
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · July 16, 1998 · 38 hours before

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
52
Certificate
Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
300 total · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 4 knots
Visibility
2 statute miles
Lowest ceiling
1,000 ft overcast
Temperature
82 °F, dew point 75 °F
Altimeter
30.00 inHg
Observed at
ABY, 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.

Other investigations on N4702S · 4

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