As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEEP-CYCLE, FOUND R2 DOOR FWD EMERGENCY LT BATTERY PACK M33097 CAN NOT OPERATE FOR A MINIMUM OF 15 MINUTES REF TO HAECO NON-ROUTINE NO. 9459827, SPEC NO. B777-33-3-7019. PERFORMED BY EMP V903686, REPLACED R2 DOOR FWD EMERGENCY LT BATT ERY PACK M33097, PERFORMED INSTALLATION TEST FOUND NORMAL REF AM M 33-51-06-960-802 REV 92A. IDT BY EMP V905446.