As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT POWER SUPPLY M1673 FAIL FUNTIONAL CHECK. (REF AAR NR 1000032270). REMOVED AND INSTALLED NEW BATTERY PACK (M1973) IAW B737 AMM 33-51-06-960-805 AND INSTALL TEST GOOD. REMOVED AND INSTALLED NEW BATTERY PACK (M1973) IAW B737 AMM 33-51-06-960-805 AND INSTALL TEST GOOD.