# NTSB DCA22LA005: Embraer S A ERJ 170-200 LR, N142SY, Chicago, IL, October 2, 2021

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: October 1, 2021, 20:18 local (Oct 2, 2021, 01:18 UTC)
- Place: Chicago, IL · Ramp area of Gate B21
- Coordinates: 41.978963, -87.907935
- Nearby events: https://openairdocs.org/map.md?lat=41.9790&lon=-87.9079&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Defining events: [Taxi: Ground collision](https://openairdocs.org/ntsb-events/200); [Taxi: Ground collision](https://openairdocs.org/ntsb-events/200)
- Highest injury: No injuries
- Injuries: 53 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Major Investigations Division
- NTSB case key (mKey): 104064
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA22LA005
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104064/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=104064
- Page: https://openairdocs.org/ntsb/DCA22LA005

## Probable cause (aircraft 1)

A ground collision by SkyWest flight 5845 that resulted in substantial damage to Republic Airlines flight 3594.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Flight crew, aircraft 1; cases with it: [Embraer S A ERJ 170-200 LR, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=3260415), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md)
- [Action: incorrect action selection](https://openairdocs.org/ntsb-findings/02041010): Personnel issues › Action/decision · Other, aircraft 2; cases with it: [Embraer S A ERJ 170-200 LR, 1 case](https://openairdocs.org/ntsb-findings/02041010/cases.md?model=3260415), [All aircraft, 397 cases](https://openairdocs.org/ntsb-findings/02041010/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Taxi: Ground collision](https://openairdocs.org/ntsb-events/200) (defining event), aircraft 1; cases with it: [Embraer S A ERJ 170-200 LR, 2 cases](https://openairdocs.org/ntsb-events/200/sequence.md?model=3260415), [All aircraft, 618 cases](https://openairdocs.org/ntsb-events/200/sequence.md)
- [Taxi: Ground collision](https://openairdocs.org/ntsb-events/200) (defining event), aircraft 2; cases with it: [Embraer S A ERJ 170-200 LR, 2 cases](https://openairdocs.org/ntsb-events/200/sequence.md?model=3260415), [All aircraft, 618 cases](https://openairdocs.org/ntsb-events/200/sequence.md)

## Analysis (aircraft 1)

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 1

- Registration: [N142SY](https://openairdocs.org/aircraft/N142SY), registered now, S/N 17000475, built 2015 (OpenAirDocs)
- Reported make and model: EMBRAER S A ERJ 170-200 LR
- Registry model: [Embraer S A ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (registry code 3260415) (OpenAirDocs)
- Registry engine: [GE CF34-8E5](https://openairdocs.org/engine/ge-cf34-8e5) (registry code 30061, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 17000475
- Year built: 2015
- Engines: GE CF34-8E5 14510 lbs thrust turbo fan; GE CF34-8E5 14510 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

## Aircraft 2

- Registration: [N730YX](https://openairdocs.org/aircraft/N730YX), registered now, S/N 17000518, built 2015 (OpenAirDocs)
- Reported make and model: EMBRAER S A ERJ 170-200 LR
- Registry model: [Embraer S A ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (registry code 3260415) (OpenAirDocs)
- Registry engine: [GE CF34-8E5](https://openairdocs.org/engine/ge-cf34-8e5) (registry code 30061, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 17000518
- Year built: 2015
- Engines: GE CF34-8E5 14510 lbs thrust turbo fan; GE CF34-8E5 14510 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

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N142SY; age 48; injuries: none; 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
- Co-pilot, aircraft N142SY; age 52; injuries: none; 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
- Pilot, aircraft N730YX; age 34; injuries: none; 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
- Co-pilot, aircraft N730YX; age 29; injuries: none; 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

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20211001022492A](https://openairdocs.org/incident/20211001022492A), Oct 1, 2021: Embraer S A ERJ 170-200 LR, Chicago, IL, Substantial damage. [privacy data omitted] Was pushed off of B22 past the normal drop point. [privacy data omitted] Was taxiing into B21 utilizing the automated parking…

## Docket (5 files)

The files NTSB released with the investigation on July 20, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=104064. 4.0 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 - skywest (item 1, PDF, 11 pages, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14184874&FileExtension=pdf&FileName=ORD%205845%20Oct%201%202021_6120%20SkyWest%20%20Redacted-Rel.pdf
- Other pertinent forms and reports - skywest summary report (item 2, PDF, 6 pages, 189 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14184824&FileExtension=pdf&FileName=ORD5845%20Skywest%20Summary%20Report-Rel.pdf
- Pilot/operator aircraft accident report, NTSB form 6120.1 - republic airlines (item 3, PDF, 11 pages, 885 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14185165&FileExtension=pdf&FileName=DCA22LA005%206120.1%20Republic-Lee%20Hayes-ORD%2001OCT_Redacted-Rel.pdf
- Employee statements republic captain (item 4, PDF, 2 pages, 27 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14184884&FileExtension=pdf&FileName=Republic%20Captain%27s%20Statement-Rel.pdf
- Employee statements - republic fo (item 5, PDF, 1 page, 23 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14185347&FileExtension=pdf&FileName=Report_4123%20Republic%20FO%27s%20Statement-Rel.pdf

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.