GAA19CA039

NTSB accident investigation · Bell OH 58A · Carson City, NV · October 27, 2018

Accident · Minor injuriesData collectionFinal report
Date
October 27, 2018, 14:45 local (22:45 UTC)
Place
Carson City, NV
Injuries
3 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N1032FBell OH 58A
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report March 20, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FSDO
FAA report
20181027020929I
Case key
98559

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 power lines while maneuvering at a low altitude in hilly terrain. Contributing to the accident was the pilot’s inability to determine the airplane’s altitude due to sun glare.

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.

Object/animal/substance: wireEnvironmental issues › Physical environment · Effect on operationBell OH-58A: 9 casesAll aircraft: 588 casesProbable cause
Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Effect on personnelBell OH-58A: 1 caseAll aircraft: 109 casesProbable cause
Terrain: mountainous/hilly terrainEnvironmental issues › Physical environment · Contributed to outcomeBell OH-58A: 1 caseAll aircraft: 329 cases

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 pilot reported that, while maneuvering at low altitude along a highway, the sun was in line with the helicopter's direction of travel and in his eyes. When the helicopter was about 200 ft above ground level, the main rotor blades struck three power lines strung across the highway. He executed an emergency landing without further incident. The pilot added that the unmarked wires crossed the highway from behind one hill to behind an adjacent hill on the other side of the highway and that the power line poles were not visible due to blocking terrain. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Factual narrative

The helicopter pilot reported that, while maneuvering at a low altitude the main rotor blades struck power lines. He executed an emergency landing without further incident. The pilot added that the power lines were concealed by the sun and that the power lines were not annotated in his VFR sectional chart. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N1032F
Reported as
Bell OH 58A (No Series)
Category
Helicopter
Serial number
70-15595
Airframe hours
7,027
Engine
Rolls Royce T63-A720, 420 horsepower, turbo shaft
Damage
Substantial damage
Flight
Aerial observation · Part 91
Operator
Washoe County Sheriffs Office
Registered owner
Washoe County Sheriffs Office
Airworthiness certificate
None
Last inspection
100 hour · August 10, 2018
Departed
RNO · Reno, NV
Destination
CXP · Carson City, NV
Equipment
ADS-B

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
54
Injuries
Minor
Certificates
Commercial, Flight instructor, Private
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
October 18, 2018
Seat
Right
Restraint
5-point
Flight hours
6,912 total · 2,025 in this make and model · 4,696 as pilot in command · 113 in the last 90 days · 21 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 9 knots, gusting 15
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 27 °F
Altimeter
30.11 inHg
Observed at
KCXP, 4 nm away

Docket · 2

The files NTSB released with the investigation on December 10, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 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.