As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - AIRCRAFT FAILED THE EMERGENCY LIGHTS TEST. THE AFT EMERGENCY POWER SUPPLY UNIT SHOWS INT AND EXT FLASHING RED LED'S. THE EMERGENCY POWER SUPPLY UNIT AT THE LEFT, MID-CABIN INDICATES A CONTINUOUS RED LED. MAINTENANCE PLACED SYSTEM ON MEL. RELAMPED EMERGENCY LIGHT ASSEMBLIES FIN 32WL AND FIN 33WL. OPERATIONALLY CHECKS OK.