As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAILED EMERGENCY LIGHTING SYSTEM BATTERY PACK M1674 (REF AAR NR 1000028364). REMOVED BATTERY PACK M1674 ON RH SIDE FORWARD CABIN IAW B737 AMM 33-51-06-960-805. INSTALLED BATTERY PACK M1674 ON RH SIDE FORWARD CABIN IAW B737 AMM 33-51-06-960-805 AND PERFORMED OPS. TEST. IAW B 737AMM 33-51-00-710-801. TEST PASS.