As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/C 78233001( EMERGENCY BATTERY PACK FUNCTIONAL CHECK FOUND FWD AND AFT BATTERY PACK FOR L1065 AND L1207 AISLE LIGHT TEST FAIL. GROUNDED - YES. REMOVED AND REPLACED POWER PACK AT FWD AND AFT CABIN LOCATION AND OPS CHECK FOUND NORMAL, REF AMM 33-51-06-960-805 AND SSM 33-51-13.