- Date
- October 1, 2021, 20:18 local (Oct 2, 2021, 01:18 UTC)
- Place
- Chicago, IL · Ramp area of Gate B21
- Injuries
- 53 uninjured
- Phase of flight
- Taxi
- Defining events
- Taxi: Ground collisionTaxi: 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
- Major Investigations Division
- FAA report
- 20211001022492A
- Case key
- 104064
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
A ground collision by SkyWest flight 5845 that resulted in substantial damage to Republic Airlines flight 3594.
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.
N142SY · Embraer S A ERJ 170-200 LR
N730YX · Embraer S A ERJ 170-200 LR
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.
N142SY · Embraer S A ERJ 170-200 LR
N730YX · Embraer S A ERJ 170-200 LR
Analysis
It was the third and last flight of the day for the crew of SkyWest flight 5845. After landing at Chicago O’Hare International Airport (KORD), Chicago, Illinois, they taxied to Gate B21 but had to wait because the gate was occupied. After Gate B21 was cleared, and as they entered to park, their left winglet impacted the right elevator of Republic Airways flight 3594, which had just pushed back from gate B22. Gate B21 was equipped with a self-park (APIS) guidance system that illuminated green, and the SkyWest flight crew said they thought it indicated that Gate B21’s Safety Zone was clear of obstacles. SkyWest Airlines did not use ground crew to ensure obstacle clearance. The flight crew of Republic flight 3594 stated that they had just pushed back from Gate B22. The tug had disconnected, the parking brake was set, and they had started both engines, and were awaiting taxi instructions, when their airplane was impacted by SkyWest flight 5845.
Aircraft · 2
- Registration
- N142SY
- Reported as
- Embraer S A ERJ 170-200 LR
- Category
- Airplane
- Serial number
- 17000475
- Built
- 2015
- Engines
- GE CF34-8E5, 14,510 lbs thrust, turbo fanGE CF34-8E5, 14,510 lbs thrust, turbo fan
- Damage
- Minor damage
- Flight
- Part 121
- Operator
- Skywest Airlines Inc
- Registered owner
- Skywest Airlines Inc
- Airworthiness certificate
- Standard, Transport
- Departed
- BOI · Boise, ID
- Destination
- Same as departure
- Flight plan
- IFR
- Airport
- ORD · Chicago O'Hare Intl
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
- N730YX
- Reported as
- Embraer S A ERJ 170-200 LR
- Category
- Airplane
- Serial number
- 17000518
- Built
- 2015
- Engines
- GE CF34-8E5, 14,510 lbs thrust, turbo fanGE CF34-8E5, 14,510 lbs thrust, turbo fan
- Damage
- Substantial damage
- Flight
- Part 121
- Operator
- Republic Airways Inc
- Registered owner
- Republic Airways Inc
- Airworthiness certificate
- Standard, Transport
- Destination
- BHM · Birmingham, AL
- Flight plan
- IFR
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 · 4
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot, aircraft N142SY
- Age
- 48
- Injuries
- None
- Certificates
- Commercial, Airline transport, Flight engineer
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Without waivers/limitations
- Last flight review
- April 22, 2021
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 10,209 total · 4,673 in this make and model · 9,101 as pilot in command
- Role
- Co-pilot, aircraft N142SY
- Age
- 52
- Injuries
- None
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, With waivers/limitations
- Last flight review
- April 23, 2021
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 1,691 total · 574 in this make and model
- Role
- Pilot, aircraft N730YX
- Age
- 34
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Without waivers/limitations
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 3,500 total · 2,500 in this make and model · 2,000 as pilot in command · 227 in the last 90 days · 78 in the last 30 days · 7 in the last 24 hours
- Role
- Co-pilot, aircraft N730YX
- Age
- 29
- Injuries
- None
- Certificates
- Airline transport, Commercial
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Without waivers/limitations
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 1,740 total · 194 in this make and model · 275 as pilot in command · 194 in the last 90 days · 69 in the last 30 days · 7 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night
- Observed at
- ORD
Docket · 5
The files NTSB released with the investigation on July 20, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.0 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.