As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY LIGHTS POWER SUPPLY M33401 IS INOPERATIVE. REPLACED EMERGENCY LIGHTS POWER SUPPLY M33401 BATTERY PACK PER AMM 33-51-06-960-802 AND AMM 33-51-06-960-803 AND WDM 33-51-15. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.