As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAILED EMERGENCY LIGHT SYSTEM BATTERY PACK M1694 (REF AAR NR 1000028369). REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY IAW B737 AMM 33-51-06-960-806 AND BATTERY PACK M1694 IAW B737 AMM 33-51-06-960-805. OP CHECK GOOD. FAILED FUNCTIONAL CHECK DURING D CHECK IN RFD,