FTW04LA176

NTSB accident investigation · Rockwell S-2R · Jonesville, LA · July 6, 2004

Accident · Minor injuriesLimited investigationFinal report
Date
July 6, 2004, 13:45 local (18:45 UTC)
Place
Jonesville, LA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8486VRockwell S-2R
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20040706017909A
Case key
59564

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 power lines.

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.

Loss of engine power(partial) - mech failure/malfManeuvering - aerial application
In flight collision with objectManeuvering - aerial application
Object - wire,transmissionCause
Clearance - not maintainedPilot in commandCause

Analysis

The 13,000-hour pilot reported that during an aerial application flight, the engine suffered a partial loss of power. The pilot initiated a turn toward the nearest airport to conduct a precautionary landing, when the airplane struck a power line. The pilot was able to land the airplane at the airport without further incident. The pilot stated that he did not see the power line prior to hitting it.

Factual narrative

On July 6, 2004, at 1345 central daylight time, a Rockwell S-2R agricultural single-engine airplane, N8486V, was substantially damaged upon collision with power lines while maneuvering near Jonesville, Louisiana. The non-instrument rated commercial pilot, sole occupant of the airplane, sustained minor injuries. The airplane was owned and operated by the Wilmot Flying Service, Inc., of Wilmot, Arkansas. Visual meteorological conditions prevailed and no flight plan was filed for the 14 Code of Federal Regulations Part 137 aerial application flight. The local flight was reported to have originated from a private airstrip near Wisner, Louisiana, at 1315.

The 13,000-hour pilot reported to the NTSB investigator-in-charge, that while spraying under a boll weevil eradication contract, the engine blower malfunctioned, resulting in a partial loss of engine power. The pilot added that he was only able to obtain a maximum of 29 inches of manifold pressure from the Pratt & Whitney R1340 radial engine with the throttle in the full-open position, so he elected to head for the nearest airport.

As the pilot initiated a turn toward the airport at the reduced power setting, the wire-cutter equipped airplane collided and cut a 1/2-inch power line which the pilot had not seen. The pilot managed to fly the airplane 5.5 miles to the Jonesville Airport, and landed without further incident.

Examination of the airplane by the pilot revealed structural damage to both wings, substantial damage to the cockpit area including the roll cage, as well as damage to the propeller, engine cowling and landing gear. The condition of the engine blower could not be established; however, the pilot reported unusually heavy oil streaks throughout the belly of the airplane.

A completed Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) was not received from either the pilot or operator.

Aircraft

Registration
N8486V
Reported as
Rockwell S-2R
Category
Airplane
Serial number
2246R
Engine
Pratt & Whitney R1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Wilmot Flying Service Inc.
Airworthiness certificate
Special, Restricted (Special)
Departed
LS35 · Wissner, LA

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
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
13,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 75 °F

FAA reports on this event · 1

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