- Date
- February 27, 2015, 10:30 local (18:30 UTC)
- Place
- Ivanhoe, CA
- Injuries
- 1 serious
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N4774SBell 47G 2A
- Defining event
- Maneuvering-low-alt flying: Abrupt maneuver
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 6, 2017
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- FAA
- FAA report
- 20150227001849A
- Case key
- 90794
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 power line while maneuvering at low altitude.
Findings · 4
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.
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
The commercial pilot was maneuvering the helicopter at low altitude to conduct agricultural spraying operations. While departing the coverage area, the pilot saw power lines and attempted to fly underneath them, but the helicopter's main rotor mast struck a wire, and the helicopter subsequently collided with terrain. The pilot reported no mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
Factual narrative
On February 27, 2015, at 1030 Pacific standard time, a Bell 47G 2A, N4774S, collided with a suspended power line 15 miles northeast of Ivanhoe, California. The helicopter was registered to Barton Aero, Inc., and operated by Gilbert Aviation as a 14 Code of Federal Aviation, Part 137 aerial application flight. The commercial pilot was seriously injured, and the helicopter was substantially damaged. Visual meteorological conditions prevailed, and a flight plan had not been filed. A Federal Aviation Administration (FAA) inspector who spoke to the pilot, stated that the pilot knew about the power line and attempted to avoid it at the last second by flying under it. The wire caught the main rotor mast and the helicopter came to rest on its right side in an orange tree orchard. The pilot was able to self extract, and sustained numerous broken bones. Examination of the helicopter wreckage by the inspector confirmed that a electrical power cable had wrapped around the helicopter's rotor mast. The pilot reported no mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
Aircraft
- Registration
- N4774S
- Reported as
- Bell 47G 2A
- Category
- Helicopter
- Serial number
- WAV182
- Built
- 1965
- Airframe hours
- 4,089
- Engine
- Lycoming VO-435 A1F, 220 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Operator
- Barton Aero Inc
- Registered owner
- Barton Aero Inc
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · January 11, 2015
- Departed
- D86 · Visalia, CA
- Destination
- D86 · Visalia, 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
- 50
- Injuries
- Serious
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Unknown
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 4,920 total · 0 in the last 90 days · 0 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 6 statute miles
- Lowest ceiling
- None
- Temperature
- 59 °F, dew point 46 °F
- Altimeter
- 29.86 inHg
- Observed at
- KVIS, 15 nm away
Docket · 3
The files NTSB released with the investigation on July 17, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 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.
Other investigations on N4774S · 2
Matched to the same aircraft by N-number and date.