As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MID CABIN CEILING AFT EMERGENCY LIGHT INOPERATIVE. SLAVED IN NEW INVERTER NR 4, BPS NR 3 AND BATTERY CHARGER. OPS CHECK FAILED. ACFT RETURNED TO ORIGINAL CONFIGURATION. REMOVED AND REPLACED MID CABIN CEILING AFT EMERGENCY LIGHT. OPS CHECK SAT.