As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - EEL - DURING OVERNIGHT MAINTENANCE, THE FORWARD LT EPSU FAULTED DURING "PUSH BUTTON" TEST. MAINTENANCE REMOVED AND REPLACED THE FORWARD LT EPSU AND BATTERY IAW AMERICA WEST AIRLINES TASK CARD R1C33303 AND A1C33302. OPERATIONAL TESTS WERE GOOD.