WPR24LA173

NTSB accident investigation · Sikorsky S-55QT · Benton City, WA · June 3, 2024

Accident · No injuriesClass 4 · LimitedFinal report
Date
June 2, 2024, 18:27 local (Jun 3, 2024, 01:27 UTC)
Place
Benton City, WA · 46.3024821251609, -119.52323672480136
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N2302FSikorsky S-55QT
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20240602009059A
Case key
194389

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 power lines during a low altitude operation.

Findings · 3

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.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedSikorsky S-55B: 2 casesAll aircraft: 1,310 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Awareness of conditionSikorsky S-55B: 2 casesAll aircraft: 588 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

The pilot stated that the purpose of the flight was to hover over cherry trees in attempt to dry off the orchard following a rain shower. While maneuvering about 30 ft above ground level (agl) at an airspeed of about 20 mph, parallel to power lines on his right side, he performed a turn, and the tail rotor blades contacted and severed the adjacent power lines. The pilot felt a tail-rotor imbalance and opted to land immediately. During the accident sequence, the helicopter sustained substantial damage to the tail rotor. The pilot reported that there were no pre-impact mechanical malfunctions or failures that precluded normal operation.

Aircraft

Registration
N2302F
Reported as
Sikorsky S-55QT
Category
Helicopter
Serial number
55188
Built
1952
Airframe hours
10,268.2
Engine
Garrett TSE331-10UA, 1,100 horsepower, turbo shaft
Damage
Substantial damage
Flight
Other work use · Part 91
Operator
N2302f LLC
Registered owner
N2302f LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 17, 2024 · 9.7 hours before
Departed
Benton City, WA
Destination
Same as departure
Equipment
None

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
66
Injuries
None
Certificates
Private, Airline transport
Airplane ratings
Single-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
June 30, 2023
Seat
Right
Restraint
4-point
Flight hours
7,827 total · 20 in this make and model · 7,243 as pilot in command · 2 in the last 90 days · 2 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 7 knots
Visibility
10 statute miles
Lowest ceiling
6,000 ft overcast
Temperature
63 °F, dew point 59 °F
Altimeter
29.69 inHg
Observed at
KRLD, 9 nm away
METAR
KRLD 030135Z AUTO 12007KT 10SM -RA OVC060 17/15 A2969 RMK AO2 T01710147

Docket · 2

The files NTSB released with the investigation on December 2, 2024, 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.