As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING INOP FWD MAIN CABIN<[01] PERFORMED T/S AS PER B737 SSM 33-51-12; SSM 33-51-14; WDM 33-51-12; AND WDM 33-51-14 AND FOUND DEFECTIVE BATTERY PACKS AT POSITION M1673; M1674; AND M1675.;[02] REPLACED EMERGENCY BATTERY PACKS AT POSITIONS M1673; M1674; AND M1675 AND PERFORMED INSTALLATION TEST AS PER B737 AMM 33-51-06-960-805. TEST OK.;[03] ACCOMPLISHED MXI PARTS TRANSACTION.;[04] VERIFIED STEPS 1-3