- 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.
On this page
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.
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.