Date:	Monday 9 December 2024
Time:	14:48 UTC
Type:	Boeing 737 MAX 8
Owner/operator:	Southwest Airlines
Registration:	N8862Q
MSN:	67863/8562
Year of manufacture:	2023
Engine model:	CFMI CFM LEAP-1B
Fatalities:	Fatalities: 0 / Occupants:
Other fatalities:	0
Aircraft damage:	None
Location:	Chicago-Midway Airport, IL (MDW/KMDW) -   United States of America
Phase:	Take off
Nature:	Passenger - Scheduled
Departure airport:	Chicago-Midway Airport, IL (MDW/KMDW)
Destination airport:	Dallas-Love Field, TX (DAL/KDAL)
Confidence Rating:	Information verified through data from accident investigation authorities

Narrative:
Southwest Airlines flight WN1783, a Boeing 737 MAX 8, was involved in a serious Category A runway incursion at Chicago-Midway Airport, IL (MDW).

ATC did not provide runway separation between the aircraft and a vehicle. The airport vehicle was parked on the west shoulder of runway 31C outside the runway edge line abeam the PAPI array. The technicians were outside the vehicle performing work on the PAPIs. The presence of the vehicle and personnel in the runway 31C RSA had been covered in the GC PRB preceding the event. GC issued taxi instructions to the aircraft for runway 31C, taxi via taxiway T and taxiway E3. During the previous LC PRB, the vehicles were mentioned but not their presence in the runway 31C RSA. LC issued Line Up And Wait (LUAW) instructions and then takeoff clearance for runway 31C to the aircraft and the aircraft departed. Estimated closest proximity between the aircraft and the vehicle parked on the shoulder was 30-40 feet.

KMDW 091353Z 26008G19KT 10SM FEW017 08/03 A2967 RMK AO2 SLP049 T00780033
KMDW 091453Z 28013G23KT 10SM FEW180 07/01 A2972 RMK AO2 SLP066 T00720011 53036

FAA

Date/time	Contributor	Updates
07-Mar-2025 12:26	ASN	Added
07-Mar-2025 12:30	ASN	Updated [Narrative, ]