- Date
- September 20, 2024, 20:23 local (Sep 21, 2024, 03:23 UTC)
- Place
- Seattle, WA · Airport environment
- Injuries
- 5 uninjured
- Phase of flight
- Standing
- Defining events
- Standing-engine(s) operating: Ground collisionTaxi-from runway: Ground collision
- Weather
- Visual (VMC) · Night
- 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
- 20240921020482I
- Case key
- 195229
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 Gulfstream pilot’s failure to maintain clearance from the Cessna while taxiing that resulted in a ground collision.
Findings · 2
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.
N513WF · Cessna 172S
N621WK · Iai Gulfstream G280
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.
N513WF · Cessna 172S
N621WK · Iai Gulfstream G280
Analysis
The ground collision occurred as one airplane (Cessna 172) was situated in the runup area, and another airplane (Gulfstream G280) was taxiing to a fixed based operator (FBO). The Gulfstream had landed and passed the turn for the FBO and was instructed by the ground controller to turn 180° and taxi to the FBO. The pilots of both airplanes were aware of each other and confirmed they had each other in sight. As the Gulfstream taxied past the Cessna, the right wing of the Gulfstream struck the left wing of the Cessna, which resulted in substantial damage to the left wing and aileron. The Gulfstream sustained minor damage to the right winglet leading edge. Both pilots reported that there were no preaccident mechanical malfunctions or failures with the airplanes that would have precluded normal operation.
Aircraft · 2
- Registration
- N513WF
- Reported as
- Cessna 172S
- Category
- Airplane
- Serial number
- 172S9756
- Built
- 2004
- Airframe hours
- 10,804
- Engine
- Lycoming IO-360-L2A, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Galvin Flying
- Registered owner
- Meow Meow LLC
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · September 4, 2024 · 48 hours before
- Airport
- BFI · Boeing Fld/King County Intl
- Equipment
- Auto-pilot, Angle of attack indicator, ADS-B, Stall warning system, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device
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.
- Registration
- N621WK
- Reported as
- Iai Gulfstream G280
- Category
- Airplane
- Serial number
- 2179
- Built
- 2019
- Airframe hours
- 948
- Engines
- Honeywell AS907-2-1G, 7,765 lbs thrust, turbo fanHoneywell AS907-2-1G, 7,765 lbs thrust, turbo fan
- Damage
- Minor damage
- Flight
- Executive/Corporate · Part 91
- Operator
- Kellanova
- Registered owner
- Kellanova
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Continuous airworthiness · August 23, 2024 · 233 hours before
- Departed
- PWK · Wheeling, IL
- Destination
- Same as departure
- Flight plan
- IFR
- Equipment
- ADS-B, Angle of attack indicator, Auto-pilot, Data recorder, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Heads up display, Onboard weather, Stall warning system
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 · 3
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot, aircraft N513WF
- Age
- 31
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 1, With waivers/limitations
- Last flight review
- May 10, 2024
- Seat
- Left
- Restraint
- 3-point
- Flight hours
- 139.7 total · 34.3 in this make and model · 40.7 as pilot in command · 21.2 in the last 90 days · 18.5 in the last 30 days · 1.4 in the last 24 hours
- Role
- Pilot, aircraft N621WK
- Age
- 51
- Injuries
- None
- Certificates
- Airline transport, Private, Commercial
- Airplane ratings
- Multi-engine sea, Single-engine sea, Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- August 5, 2024
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 5,668 total · 256 in this make and model · 5,066 as pilot in command · 105 in the last 90 days · 48 in the last 30 days · 5 in the last 24 hours
- Role
- Co-pilot, aircraft N621WK
- Age
- 40
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Single-engine sea, Multi-engine land, Single-engine land
- Instrument ratings
- Helicopter, Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- August 31, 2024
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 6,290 total · 7 in this make and model · 2,962 as pilot in command · 59 in the last 90 days · 10 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night
- Wind
- Calm
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 61 °F, dew point 48 °F
- Altimeter
- 30.19 inHg
- Observed at
- KBFI, 1 nm away
- METAR
- METAR KBFI 210353Z 00000KT 10SM SCT200 16/09 A3019 RMK AO2 SLP224 T01560089=
Docket · 4
The files NTSB released with the investigation on April 22, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 17.7 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.
Other investigations on N513WF · 1
Matched to the same aircraft by N-number and date.