CHI94LA276

NTSB accident investigation · Bell 47G3B1 · Sargeant, MN · August 11, 1994

Accident · No injuriesLimited investigationFinal report
Date
August 11, 1994, 11:00 local (16:00 UTC)
Place
Sargeant, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N64292Bell 47G3B1
Weather
Visual (VMC) · Day
Status
Completed · report January 12, 1995
Report
Approved by Office Director
FAA report
19940811021189A
Case key
9635

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's failure to maintain clearance from a transmission wire during an agricultural spray run. A factor in the accident is the transmission 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 - wire,transmissionFactor
Clearance - not maintainedPilot in commandCause
Forced landingDescent - emergency
In flight collision with terrain/waterDescent - emergency

Analysis

The pilot reported he had just completed an aerial application spray run with the helicopter, and was maneuvering to start another run. He turned the helicopter to miss a guy wire, and in the process inadvertently allowed the main rotor blades to strike a transmission wire. He was able to maintain partial control of the helicopter, and made a forced landing in a nearby field.

Factual narrative

On August 11, 1994, about 1100 central daylight time, a Bell 47G3B1 helicopter, N64292, sustained substantial damage when it collided with power lines near Sargeant, Minnesota. The commercial pilot reported no injury. The aerial application flight operated in visual meteorological conditions without flight plan under 14 CFR Part 137.

The pilot reported he was making a swath run and maneuvered to miss a guy wire. During the turn to avoid the guy wire, the helicopter's main rotor collided with power lines. The pilot was able to maintain partial control of the helicopter, and made a forced landing in a nearby field.

Aircraft

Registration
N64292
Reported as
Bell 47G3B1
Category
Helicopter
Serial number
3730
Airframe hours
8,690
Engine
Lycoming VO-435-A1F, 265 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Agri Helicopter, Inc.
Airworthiness certificate
Standard, Normal; Special, Restricted (Special)
Last inspection
100 hour · July 5, 1994 · 6 hours before

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
30
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
203 total · 95 in this make and model · 152 as pilot in command · 23 in the last 90 days · 12 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 2 knots
Visibility
10 statute miles
Lowest ceiling
1,200 ft overcast
Temperature
63 °F

FAA reports on this event · 1

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