As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT POWER PACK M33408 CAPACITY CHECK FAIL REF HAECO NON-ROUTINE NO.9486164 - ORIGINATED BY EMP V903215,SPEC NO.B777- 33-3-7019. PERFORMED BY EMP V905389, REPLACED M33408 EMERGENCY LIGHT POWER SUPPLY BATTERY PACK AND POWER PACK AND TEST NORMAL AS PER AMM 33 -51-06-960-801 & AMM 33-51-06-960-803 REV.94.