As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CMCF EXISTING FAULT MESSAGE APPEARED 33-12120; 33-12129 - REF HAECO NON-ROUTINE NO.9435766, EA 4400-01109 REV.A OP001. THE NO.20 WBU REP LACED AND PERFORMED INSTALLATION TEST. THE RESULT FOUND NORMAL. THE CMCF FAULT MESSAGE DISAPPEARED REFER AMM 33-51-07-02B-520A/7 20A REV.146.