As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LLAR EMERGENCY LIGHT BATTERY M23 CAPACITY TEST LESS THAN 15 MINU TES REF TO HAECO NON-ROUTINE NO.9473795, SPEC NO.B777-33-3-7019. LLAR EMERGENCY LIGHT BATTERY M23 REPLACED AND CARRIED OUT NEW BA TTERY PACK TEST FOUND ''NORMAL'' AS PER AMM 33-51-06-960-802 REV99 .