MIA92LA003

NTSB accident investigation · Bell 47D-1 · Clewiston, FL · October 4, 1991

Accident · Minor injuriesLimited investigationFinal report
Date
October 4, 1991, 09:00 local (13:00 UTC)
Place
Clewiston, FL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3655FBell 47D-1
Weather
Visual (VMC) · Day
Status
Completed · report April 8, 1993
Report
Approved by Office Director
FAA report
19911004045079A
Case key
33014

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

The pilot in command's failure to maintain adequate clearance while maneuvering resulting in an in flight collision with a guy wire.

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 objectManeuvering - aerial application
Object - guy wire
Clearance - not maintainedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

While pulling up following a spray pass either the lt skid or spray boom contacted a guy wire which then broke & contacted the main & tail rotor blades. During the uncontrolled descent, the helicopter rolled inverted & impacted the ground. The plt stated that there was no preimpact failure or malfunction of the helicopter.

Aircraft

Registration
N3655F
Reported as
Bell 47D-1
Category
Helicopter
Serial number
45
Airframe hours
8,685
Engine
Franklin 6V4-200CS2, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Allied Helicopter Service, Inc
Registered owner
Allied Helicopter Service, Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Continuous airworthiness · September 18, 1991 · 15 hours before

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Certificate
Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
1,741 total · 89 in this make and model · 1,680 as pilot in command · 36 in the last 90 days · 29 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F

FAA reports on this event · 1

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