As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER T/C 78233001 EMER BAT PACK CAPACITY FUNCTIONAL CHECK, FOUND SOME BATTERY PACK FAIL THE TIME TEST AS FOLLOW: R2 AND L2 DOORS INSIDE AND OUTSIDE. R1 AND L1 DOORS INSIDE AND OUTSIDE. AFT GALLEY EXIT SIGN. GROUNDED - YES. REMOVED AND REPLACED THE FOLLOWING EMERGENCY POWER SUPPLY BATTERY ASSY'S WITH NEW IN SERVICE UNITS; M2816, M1675, M1672, AND M1673 REF WDM 33-51-12-4, 33-51-14-3 AND AMM 33-51-06. OPS NORMAL. 4 CBS COLLARED AND RESET.