ERA11LA083

NTSB accident investigation · Bell 206B · Isom, KY · December 10, 2010

Accident · Minor injuriesLimited investigationFinal report
Date
December 10, 2010, 11:55 local (16:55 UTC)
Place
Isom, KY
Injuries
1 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N263CHBell 206B
Defining event
Maneuvering-low-alt flying: Collision with terr/obj (non-CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report July 21, 2011
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20101210052919A
Case key
77979

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to maintain clearance from a known wire hazard during an aerial observation flight.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Action: lack of actionPersonnel issues › Action/decision · PilotBell 206B: 6 casesAll aircraft: 792 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

During a local aerial power line observation flight, the helicopter impacted the static wire for the power line. The pilot reported that he never lost control of the helicopter, but landed as soon as he could in a parking lot, which was about 1/4 mile from the wire strike. He further stated that prior to the wire strike; there were no mechanical anomalies with the helicopter. A Federal Aviation Administration inspector that responded to the accident site reported that a 12 inch piece of the 7-strand wire remained in the wire cutter located below the main rotor mast.

Factual narrative

On December 10, 2010, about 1155 eastern standard time, a Bell 206B, N263CH, performed an emergency landing next to a roadway after impacting electrical wires near Isom, Kentucky. The helicopter departed from a remote location near Whitesburg, Kentucky, about 1030, for the local aerial powerline observation flight. Visual meteorological conditions prevailed and no flight plan was filed. The certificated airline transport pilot received minor injuries and the two passengers were not injured. The helicopter sustained substantial damage to the support post around the pilot side door and damage to the fuselage on the front and pilot side of the helicopter. The flight was operated under the provisions of 14 Code of Federal Regulations Part 135. According to the pilot, he was performing a power line survey flight for charter and also had employees from the power company onboard. The helicopter was cruising "about 60 to 70 knots" when it impacted the static line on top of a powerline. He reported that he never lost control of the helicopter, but put it down as soon as he could in a parking lot, which was about one-quarter mile from the wire strike. He further stated that prior to the wire strike; there were no mechanical anomalies with the helicopter. According to Federal Aviation Administration (FAA) records and the pilot, age 56, he held an Airline Transport Pilot and commercial pilot certificates, with ratings for single-engine land, multiengine land, single-engine sea, helicopter, and instrument airplane and helicopter. His most recent FAA second-class medical was issued on November 17, 2010. He reported a flight time of approximately 19,000 total hours of flight experience, 3,750 total hours of flight experience in rotorcraft, and 3,500 total hours of flight experience in the accident helicopter make and model. His most recent flight review was conducted on November 2, 2010. The helicopter was issued an FAA airworthiness certificate on August 22, 1979, and was registered to the accident pilot on May 16, 1997. It had undergone an annual inspection on October 13, 2010 and at the time of the accident had 3,348 total time in service. The 1153 recorded weather observation at Julian Carroll Airport (JKL), Jackson, Kentucky, located approximately 31 miles to the northwest of the accident site included variable winds of 3 knots visibility 10 miles, scattered clouds at 3, 500 feet above ground level, temperature 7 degrees C, dew point minus 7 degrees C, and an altimeter setting of 30.14 inches of mercury. The FAA inspector that responded to accident location reported that the helicopter impacted a 3/8 inch diameter, 7-strand wire. A few of the strands were severed by the wire cutter located below the main rotor mast, and a 12 inch piece of strand remained in the wire cutter. One main rotor blade exhibited damage approximately 1 foot from the rotor tip. Control continuity was confirmed to all flight controls and no damage was observed to the landing gear.

Aircraft

Registration
N263CH
Reported as
Bell 206B
Category
Helicopter
Serial number
2778
Airframe hours
3,348
Engine
Rolls-Royce 250-C20B, 317 horsepower, turbo shaft
Damage
Substantial damage
Flight
Part 135
Operator
Albatross Air, Inc.
Registered owner
White Oak Flight Service Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 13, 2010 · 23 hours before
Departed
Whitesburg, KY
Destination
Whitesburg, KY
Flight plan
Company VFR

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
56
Injuries
Minor
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2, With waivers/limitations
Last flight review
November 2, 2010
Seat
Right
Flight hours
19,000 total · 3,500 in this make and model · 18,800 as pilot in command · 100 in the last 90 days · 60 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
45 °F, dew point 19 °F
Altimeter
30.13 inHg
Observed at
JKL, 31 nm away

Docket · 4

The files NTSB released with the investigation on May 25, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 MB in all.

FAA reports on this event · 1

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