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Aviation safety reports, made easier to study

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NTSB Report

March 4, 2008 · Bell 206L · N404EH

Nikolai, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
March 4, 2008
Injury Outcomes
2 injuries (2 minor injuries)
Location
Nikolai, AK
Aircraft
Bell 206L
Tail Number
N404EH
Operator
John Oney
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC08LA040

The commercial pilot was maneuvering the helicopter while his passenger filmed a dogsled race. The pilot reported that he was flying along slowly, and a gust of wind caused a loss of tail rotor effectiveness. He said the helicopter started to turn to the right, and he reduced collective pitch and followed the turn to regain control. During the maneuver he said he was losing altitude and approaching terrain. He said a second gust caused a further loss of tail rotor effectiveness, and as the helicopter rotated the tail rotor struck a tree, and the helicopter impacted the ground. He said there were no preimpact mechanical anomalies with the helicopter prior to the accident. The helicopter was not examined by the NTSB.

NTSB Probable Cause

The pilot's inadequate compensation for wind conditions, and an inadvertent loss of tail rotor effectiveness while maneuvering. A factor contributing to the accident was wind gusts.

Full Narrative

On March 4, 2008, about 1630 Alaska standard time, a Bell 206L helicopter, N404EH, sustained substantial damage when it collided with terrain, following a loss of control while maneuvering, about 59 miles southeast of Nikolai, Alaska. The helicopter was being operated by the pilot as a visual flight rules (VFR) aerial photography flight under Title 14, CFR Part 91, when the accident occurred. The commercial certificated pilot and sole passenger received minor injuries. Visual meteorological conditions prevailed, and no flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on March 5, the pilot said he was maneuvering the helicopter while his passenger filmed a dogsled race, when the helicopter impacted terrain. He said there were no preimpact mechanical anomalies with the helicopter. The helicopter received structural damage to the fuselage and rotor system during the collision with terrain. In a written statement dated March 13, the pilot reported that he was flying along slowly, and a gust of wind caused a loss of tail rotor effectiveness. He said the helicopter started to turn to the right, and he reduced collective pitch and followed the turn to regain control. During the maneuver he said he was losing altitude and approaching terrain. He said a second gust caused a further loss of tail rotor effectiveness, and as the helicopter rotated, the tail rotor struck a tree, and the helicopter impacted the ground. The helicopter was not examined by the NTSB.

Flight

Event TypeAccident
Event Time11:30 AKST
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBell 206L
Tail NumberN404EH
Aircraft CategoryHeli
DamageSubstantial
OperatorJohn Oney
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsRolls-Royce · 250-C20R12 · Turboshaft · 450
Seats7

People & Injuries

Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 74 · Second Class · Minor

Conditions

ConditionsVMC
LightDaylight
Wind10 kt, gusting 25 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point37 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data