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 POWER SUPPLY UNIT (M33400) LOCATED ABOVE DOOR 3L FAILED TEST. REPLACED EMERGENCY POWER SUPPLY UNIT ASSEMBLY PER AMM 33-51-06, LOCATED ABOVE DOOR 3L (M33400) AND PERFORMED SATISFACTORY OPERATIONAL CHECK.