As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CIDS FAULTS RT EPSU. REPLACED RT EPSU. ACCOMPLISHED A SATISFACTORY OPS CHECK IAW AMM 33-51-38. VENDOR INSPECTED & TESTED WITH A SHOP BATTERY IAW CMM 33-51-12 REV 3. FOUND NO FAULTS & DID NOT CONFIRM THE INITIAL REPORTED FAULT. UNIT WAS FOUND TO BE SERVICEABLE WITH FULLY CHARGED BATTERY. RETURNED THE UNIT BACK AS SERVICEABLE.