WPR25LA199

NTSB accident investigation · Robinson Helicopter R66 · Tukwila, WA · June 30, 2025

Accident · No injuriesClass 4 · LimitedFinal report
Date
June 30, 2025, 12:43 local (19:43 UTC)
Place
Tukwila, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N23UPRobinson Helicopter R66
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report November 6, 2025
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
20250630008439A
Case key
200470

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 yaw control during a takeoff to a hover in a gusting crosswind, which resulted in a loss of directional control and a subsequent hard landing.

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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedRobinson Helicopter R66: 2 casesAll aircraft: 3,958 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationRobinson Helicopter R66: 1 caseAll aircraft: 594 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 and pilot-rated passenger boarded the helicopter for a local flight and were cleared by air traffic control to depart south. The pilot lifted the helicopter off the ramp and began to hover taxi east toward the taxiway with a left gusting crosswind. Surveillance video footage of the takeoff showed that shortly after lifting off, the helicopter yawed left about 90° while drifting east towards the taxiway. The helicopter continued to drift and then climbed in a slight nose up attitude. About 50 feet above ground level, the nose pitched down sharply, and it began a steep descent to the left. The helicopter pitched up to about level attitude and then landed hard on its skids. Subsequently, the helicopter bounced and climbed to the west out of the surveillance camera’s view. According to the pilot, when the helicopter lifted off the pad and did not respond to torque pedal inputs as expected, he transferred the helicopter’s controls to the pilot rated passenger. According to the pilot-rated passenger, he did not assume control of the helicopter until shortly before the helicopter impacted the ramp. After impact with the ramp and bounced, the pilot-rated passenger added power to climb over nearby powerlines and landed the helicopter without further incident. A post-accident inspection of the helicopter revealed it sustained substantial damage to the fuselage and tailboom. Additionally, a visual examination of the helicopter’s flight controls did not reveal any pre-impact anomalies. The pilot-rated passenger reported he did not observe any mechanical failures or malfunctions with the helicopter that would have precluded normal operation. The airport’s automated weather observation station reported that, about the time of the accident, the wind was from 300° at 10 knots, gusting to 16 knots.

Aircraft

Registration
N23UP
Reported as
Robinson Helicopter R66
Category
Helicopter
Serial number
0270
Built
2012
Engine
Rolls-Royce 250-C300/A1, turbo shaft
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Seattle Air Taxi LLC
Registered owner
Seattle Air Taxi LLC
Airworthiness certificate
Standard, Normal
Destination
S50 · Auburn, WA
Airport
BFI · Boeing Field/King County International Airport
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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
85
Injuries
None
Certificates
Airline transport, Private
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Seat
Right
Role
Pilot
Age
52
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 10 knots, gusting 16
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 54 °F
Altimeter
29.99 inHg
Observed at
KBFI
METAR
KBFI 301953Z 30010G16KT 10SM CLR 26/12 A2999 RMK AO2 SLP154 T02610122

Docket · 8

The files NTSB released with the investigation on November 6, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 27.7 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.