As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR L2 EMERGENCY POWER PACK (M33099) CAPACITY CHECK FOUND CAN''T STAYED EMERGENCY LIGHTS ON FOR 15 MINUTES. REF HAECO NR NO.94786 10 - SPEC NO.B777-33-3-7019. REPLACED DOOR L2 EMERGENCY POWER PACK (M33099) AND PERFORMED THE INSTALLATION TES T, THE RESULT FOUND NORMAL AS PER AMM 33-51-06-960-802 REV.100.