As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4004 - AIR STAIR EMERGENCY LIGHT INOP. REPLACED ALL WIRING BETWEEN CONNECTOR 253VC AT THE TOP OF THE PAX DOOR STEP IAW STANDARD PROCEDURES MM CHAPTER 20. PERFORMED OPERATIONAL CHECK SATISFACTORILY. AIRCRAFT RETURNED TO SERVICE. (M)