As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN SET THE EMERGENCY LIGHT SWITCH TO THE ON MODE,FND M33094 POWER PACK CAN NOT STAY ON FOR 15 MINUTES REFER HAECO NON-ROUTIN E LOG PAGE:9492061,ORIGINATED BY EMP:V903529 ORIGINATING CARD:23 -3350-1-0001. REPLACED M33904 POWER SUPPLY BATTERY AND CARRY OUT OPERATIONAL TEST IAW AMM 33-51-06-960-802 REV.1 06 THE RESULT WAS NORMAL.