As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF T/C 78233001, ACFT FAILS POWER SUPPLY, BATTERY CAPACITY CHECK. ALL EMERGENCY LIGHTS, SIGNS WILL NOT MAINTAIN THE MINIMUM 15 MINUTE OPS CK. ACFT GROUNDED. R & R 2 EA BATTERY PACKS AT FWD GALLEY. R & R 2EA BATTERY PACKS AT LT & RT OVERWING EXIT DOORS. R & R 1EA BATTERY PACK AT ROW 22ABC. R & R 2 EA BATTERY PACKS AT AFT GALLEY. 7 TOTAL BATTERY PACKS CHANGED ALL WORK, REF AMM 33-51-06. OPS CHECKS GOOD REF MM AMM 33-51-06.