As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEEP-CYCLE,FOUND L4 DOOR(DM33407) EMERGENCY LT BATTERY PA CK CAN NOT OPERATE FOR A MINIMUM OF 15 MINUTES REFER HAECO NON-R OUTINE NO.9461209,ORIGINATED BY EMP:V903686,SPEC NO.B777-33-3-70 19. PERFORMED BY EMP:V903686,REPLACED L4 DOOR (DM33407)EMERGENCY LT BATTERY PACK AND PERFORMED INSTALLATION TEST FOUND NORMAL REF AM M 33-51-06-960-802 REV.93.IDT BY EMP:V905446.