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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

October 1, 2006 · Brantly Helicopter B-2 · N5950X

Arkansas City, KS

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
October 1, 2006
Injury Outcomes
2 injuries (2 minor injuries)
Location
Arkansas City, KS
Aircraft
Brantly Helicopter B-2
Tail Number
N5950X
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN07CA001

According to the pilot, during the attempted takeoff, he raised the collective and the helicopter "became light on its skids." The pilot verified the wind conditions based on his observation with nearby trees. The wind was observed to be "light" and from the south-southwest direction. The pilot initiated a turn into the direction of the wind, and prior to transitional lift, the rotor RPM dropped. The pilot attempted to recover the drop in rotor RPM by lowering the collective. The helicopter skids touched the terrain, and the helicopter rolled over on it's right side. The pilot stated, "I believe I got a wind gust that contributed to the low [rotor] RPM."

NTSB Probable Cause

the pilot's failure to maintain aircraft control during takeoff. A contributing factor was the low rotor RPM.

Full Narrative

According to the pilot, during the attempted takeoff, he raised the collective and the helicopter "became light on its skids." The pilot verified the wind conditions based his observation with nearby trees. The wind was observed to be "light" and from the south-southwest direction. The pilot initiated a turn into the direction of the wind, and prior to transational lift, the rotor RPM dropped. The pilot attempted to recover the drop in rotor RPM by lowering the collective. The helicopter skids touched the terrain, and the helicopter rolled over on it's right side. The pilot stated, "I believe I got a wind gust that contributed to the low [rotor] RPM."

Flight

Event TypeAccident
Event Time08:30 CDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo

Aircraft

AircraftBrantly Helicopter B-2
Tail NumberN5950X
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-360-A1B · Reciprocating

People & Injuries

Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 59 · Third Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0

External Links

Appendix: Source Data