As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT OF WING EMERGENCY SLIDE LIGHT BOTH LH AND RH SIDE ARE OUT <[01]. DURING TROUBLESHOOTING; DETERMINED THAT THIS DEFECT AND DEFECT TTG8Q00YW88S ARE BOTH CONTROLLED BY BATTERY CHARGER/POWER SUPPLY ASSEMBLY M1670 PER WDM 33-51-13. REPLACED BATTERY PACK/CHARGER ASSEMBLY AND TESTED PER AMM 33-51-06-960-805 AND AMM 33-51-06-960-806; NO DEFECTS NOTED. NOTE: PARTS REPLACEMENT DOCUMENTED ON MSI DEFECT TTG8Q00YW88S; [02] VERIFIED CORRECTIVE ACTION #1.