NYC90LA025

NTSB accident investigation · Bell 47G-3B1 · Westfield, MA · November 4, 1989

Accident · Minor injuriesLimited investigationFinal report
Date
November 4, 1989, 11:30 local (16:30 UTC)
Place
Westfield, MA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N57919Bell 47G-3B1
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 1992
Report
Approved by Office Director
FAA report
19891104044329A
Case key
36581

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

Loss of aircraft control for an undetermined reason, which resulted in the tail rotor striking the ground and separating from the helicopter.

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 terrain/waterHover
Reason for occurrence undeterminedCause
Terrain condition - ground
Clearance - not maintainedPilot in command
Rotor system,tail rotor blade - separation
Aircraft control - not possible

Analysis

The pilot said he was making clearing turns when he had a problem with the cyclic control. The helicopter went out of control and collided with the terrain. There was evidence the tail rotor blades had separated after contacting the ground. No discrepancies were found with the hydraulic system or flight controls.

Aircraft

Registration
N57919
Reported as
Bell 47G-3B1
Category
Helicopter
Serial number
3828
Engine
Lycoming TVO-435, 270 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Belchertown Aviation
Airworthiness certificate
Standard, Normal
Departed
Belchertown, MA
Destination
BAF · Westfield, MA
Airport
BAF · Barnes Muni

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
36
Certificate
Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
265 total · 209 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 6 knots
Lowest ceiling
None
Temperature
39 °F, dew point 25 °F

FAA reports on this event · 1

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