As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR 3R EMERGENCY LIGHTING POWER SUPPLY M33401 BATTERY LOW CAPACITY DURING CAPACITY CHECK REFER HAECO NON-ROUTINE NO.9452661 - ORIGINATED BY EMP V903172,SPEC NO.B777-33-3-7019 PERFORMED BY EMP V903172 ON HAECO NON-ROUTINE LP9452661,REPLACED THE DOOR 3R EMERGENCY LIGHT POWER SUPPLY M33401 BATTERY AND OP TEST CARRIED OUT,FOUND NORMAL AS PER AMM 33-51-06-960-802 REV 97 IDT BY TA409