As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD AND AFT ZONE LH CEILING EMERGENCY LT AND DOOR 4L WERE INOP. REPLACED D1L EMERGENCY LT POWER SUPPLY ASSEMBLY M33424 AND REINSTALL D4L EMERGENCY LT BATTERY PACK M33407 AND CHARGE AND TEST RESULT NORMAL AS PER AMM 33-51-06-960-802 & AMM 33-51-06-960-803 REV.104.