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Aviation safety reports, made easier to study

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NTSB Report

September 12, 2007 · Bell 47G-3B-1 · N360SS

Avondale, CO

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
September 12, 2007
Injury Outcomes
No injuries (1 uninjured)
Location
Avondale, CO
Aircraft
Bell 47G-3B-1
Tail Number
N360SS
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN07LA155

The pilot took off downhill with no wind. The wind shifted to the west to a tailwind of 10 to 12 knots. The pilot said he was "unable to gain effective translational lift" and he attempted to land with a forward speed of 5 to 6 mph. He attempted to stop the helicopter but in doing so, "the tail skid struck the ground at the same time the skids did. Then the aircraft lurched forward, causing the main rotor to come in contact with the tail boom." The tail boom was severed and the skids were broken torsionally from the airframe.

NTSB Probable Cause

The pilot's failure to attain translational lift and his improper flare. A contributing factor in this accident was the sudden wind shift.

Full Narrative

On September 12, 2007, approximately 1330 mountain daylight time, a Bell 57G-3B-1, N360SS, piloted by a commercial pilot, was substantially damaged during a hard landing near Avondale, Colorado. Visual meteorological conditions prevailed at the time of the accident. The aerial application flight was being conducted under the provisions of Title 14 CFR Part 137 without a flight plan. The pilot, the sole occupant on board, was not injured. The flight was originating at the time of the accident. According to the pilot's statement, he was crop dusting a field approximately 17 miles south of Pueblo. He took off downhill with no wind. The wind shifted to the west to a tailwind of 10 to 12 knots. The pilot said he was "unable to gain effective translational lift" and he attempted to land with a forward speed of 5 to 6 mph. He attempted to stop the helicopter but in doing so, "the tail skid struck the ground at the same time the skids did. Then the aircraft lurched forward, causing the main rotor to come in contact with the tail boom." An examination of the helicopter revealed the tail boom was severed and the skids were broken torsionally from the airframe. The helicopter came to rest upright.

Flight

Event TypeAccident
Event Time13:30 MDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBell 47G-3B-1
Tail NumberN360SS
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · TVO-435-B1A · Reciprocating · 265
Seats1

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 61 · Second Class · None

Conditions

ConditionsVMC
LightDaylight
Wind270° @ 10 kt, gusting 12 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point70 F / 28 C
Altimeter30.00 inHg
Weather SourcePILO

Appendix: Source Data