As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERAL EMERGENCY LIGHTS INOP THROUGH OUT PASSENGER CABIN.<[01] PERFORMED TROUBLESHOOTING FOR EMERGENCY LIGHTS AS PER B737 WDM 33-51-11; WDM 33-51-11; WDM 33-51-12; WDM 33-51-14; AND WDM 33-51-14 AND FOUND BATTERY PACKS AT POSITIONS M1671; M1675; M1694; AND M1695 DEFECTIVE. REMOVED AND REPLACED BATTERY PACKS AT POSITIONS M1671; M1675; M1694; AND M1695 AS PER B737 AMM 33-51-06-960-805. PERFORMED BATTERY PACKS INSTALLATION TEST AS PER B737 AMM 33-51-06-960-805. TEST PASSED;[02] VERIFIED STEP 1