WPR23LA145

NTSB accident investigation · Robinson Helicopter R44 II · Elko, NV · April 1, 2023

Accident · No injuriesClass 4 · LimitedFinal report
Date
April 1, 2023, 08:23 local (15:23 UTC)
Place
Elko, NV
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N462BARobinson Helicopter R44 II
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
FAA
Case key
106998

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 sufficient altitude and airspeed in gusting tailwind conditions that resulted in an unrecoverable descent and impact with terrain.

Findings · 5

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.

Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationRobinson Helicopter R44 II: 13 casesAll aircraft: 594 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleRobinson Helicopter R44 II: 39 casesAll aircraft: 1,310 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 purpose of the flight was aerial animal control. The pilot reported that while flying at about 30kts and 50 ft above the ground and during a sweeping turn to avoid the effects of an estimated 30 kt tailwind at low altitude, a strong wind gust occurred in the path of the tailwind, which led to an uncontrolled descent rate. Unable to arrest the descent rate, the pilot executed a run-on landing. Environmental conditions weakened the pilot’s depth perception, which resulted in a tail strike that sheared off the tail boom. The main rotor blades contacted the ground and the helicopter rolled on its side, substantially damaging the fuselage and tail boom. The pilot reported that there were no mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Aircraft

Registration
N462BA
Reported as
Robinson Helicopter R44 II
Category
Helicopter
Serial number
12265
Built
2008
Airframe hours
4,077
Engine
Lycoming IO-540-AE1A5, 245 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Elkhorn Aviation Inc, doing business as Baker Aircraft
Registered owner
Elkhorn Aviation Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 4, 2023
Departed
Elko, NV
Destination
Priv · Elko, NV
Airport
KEKO
Equipment
Stall warning system, Handheld GPS, 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
25
Injuries
None
Certificates
Commercial, Flight instructor
Instrument ratings
Helicopter
Medical
Class 2, Without waivers/limitations
Last flight review
May 17, 2022
Seat
Right
Restraint
4-point

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 16 knots, gusting 27
Visibility
10 statute miles
Lowest ceiling
8,500 ft broken
Temperature
55 °F, dew point 23 °F
Altimeter
29.94 inHg
Observed at
KEKO
METAR
KEKO 012256Z AUTO 25016G27KT 10SM BKN085 13/M05 A2994 RMK AO2 PK WND 22031/2223 SLP133 T01281050

Docket · 2

The files NTSB released with the investigation on October 20, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.3 MB in all.