What was found
AIRCRAFT IN BASE MAINTENANCE: INOPERATIVE EMERGENCY POWER SUPPLY UNIT AFT LEFTHAND SIDE ON AFT PASSENGER AREA. REPLACED EMERGENCY POWER SUPPLY UNIT (13WL).
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT IN BASE MAINTENANCE: INOPERATIVE EMERGENCY POWER SUPPLY UNIT AFT LEFTHAND SIDE ON AFT PASSENGER AREA. REPLACED EMERGENCY POWER SUPPLY UNIT (13WL).