LAX03CA285

NTSB accident investigation · Bell 47G-5 · Greenfield, CA · September 13, 2003

Accident · No injuriesData collectionFinal report
Date
September 13, 2003, 08:30 local (15:30 UTC)
Place
Greenfield, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N7060JBell 47G-5
Weather
Visual (VMC) · Day
Status
Completed · report February 5, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20030913022749A
Case key
57933

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 with the wires due to an inadequate visual lookout.

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
Visual lookout - inadequatePilot in commandCause
Object - wire,transmission
Clearance - not maintainedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

The helicopter collided with power lines during an aerial application. As the pilot was lining up the helicopter in the corner of the lot, the helicopter descended into a wire. The wire wrapped around the mast and control linkages and the helicopter began pitching in an unusual manner. He attempted to level off; however, the controls were unresponsive and the helicopter collided with the ground.

Factual narrative

On September 13, 2003, about 0830 Pacific daylight time, a Bell 47G-5 restricted category helicopter, N7060J, collided with power lines during an aerial application near Greenfield, California. SoilServ, Inc., was operating the helicopter under the provisions of 14 CFR Part 137. The commercial pilot, the sole occupant, was not injured; the helicopter sustained substantial damage. Visual meteorological conditions prevailed and no flight plan had been filed. The flight departed from the local area about 0823. The primary wreckage was at 36 degrees 19.726 minutes north latitude and 121 degrees 13.279 minutes west longitude.

The pilot reported in a written statement that he was en route to the first field. As he was lining up the helicopter in the corner of the lot, the helicopter descended into a wire that was located outside the boundaries of the field. The helicopter began pitching in an unusual manner. After attempting to level off, he realized the controls were unresponsive and the helicopter collided with the ground. A later inspection by the pilot revealed that the wire had wrapped around the mast and control linkages.

Aircraft

Registration
N7060J
Reported as
Bell 47G-5
Category
Helicopter
Serial number
25017
Engine
Lycoming VO-435, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Soilserv Inc
Registered owner
Soilserv Inc
Airworthiness certificate
Special, Restricted (Special)
Departed
Greenfield, CA

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
42
Certificates
Commercial, Private
Airplane ratings
Single-engine land
Medical
Class 2
Flight hours
6,481 total · 3,600 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 0 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 55 °F
Altimeter
29.81 inHg
Observed at
SNS

FAA reports on this event · 1

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

Other investigations on N7060J · 2

Matched to the same aircraft by N-number and date.