LAX85LA200

NTSB accident investigation · Bell 206B · Lake Berryessa, CA · April 12, 1985

Accident · Minor injuriesLimited investigationFinal report
Date
April 12, 1985, 13:00 local (21:00 UTC)
Place
Lake Berryessa, CA
Injuries
4 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N2925WBell 206B
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850412014989A
Case key
24691

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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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 objectCruise
Object - wire,transmissionFactor
Visual lookout - inadequatePilot in commandCause
Visual/aural perceptionPilot in commandFactor
Forced landingDescent - emergency
Autorotation - attemptedPilot in command
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The acft was on a low level, eagle survey mission. While cruising between 20 & 30 mph, the plt flew up a canyon & was crossing a ridge at about 150 ft AGL when he saw wires ahead. He took evasive action, but the helicopter struck the wires. The tail rotor & gear box were torn from the helicopter & it began spinning. The plt tried to lower the collective & retard the throttle to stop the spin, but had no throttle or collective control. Subsequently, the helicopter crash landed.

Aircraft

Registration
N2925W
Reported as
Bell 206B
Category
Helicopter
Serial number
206B
Airframe hours
14,848
Engine
Allison 250-C20, 317 horsepower, turbo shaft
Damage
Substantial damage
Flight
Part 135
Operator
Horizon Helicopter, Inc.
Registered owner
Dennis Webster
Airworthiness certificate
Standard, Normal
Departed
Lake Berryessa, CA
Flight plan
Company VFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
35
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
8,800 total · 580 in this make and model · 8,600 as pilot in command · 190 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
None
Temperature
70 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.