As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLACK BATTERY PACK FOR EMERGENCY LIGHT INOPERATIVE IN AFT LAVATORY. REMOVED AND REPLACED BAT5014 SERIAL 20640,B 528, STATION 1338 WITH BAT5014 SERIAL 28703 IN ACCORDANCE WITH IPC 33-50-00-12D AND AMM 33-53-00-6 CHECKS GOOD PER WORK CARD 4289 AND 4854.