What was found
JFK - FLT 611 - INITALLY RECEIVED AFT FUEL TRANSFER UNAVAILABLE, SEVERAL MINUTES LATER WE RECEIVED EXCESSIVE AFT CG ECAM WARNING. CG AT THE TIME WAS APPROX 29.3 PERCENT. WENT TO ALTERNATE FUEL BURN PROCEED. AND CG WENT TO 28.3 PERCENT. THEN RECEIVED CONTINUOUS EXCESSIVE AFT CG WARNING ABOUT EVERY 10 MINUTES. PLACARDED/DEFRD THE CGCC INOP IAW MEL REF 28-27B AUTH 2-145DC-C. ENTERED IN MIC SHEET. REPLACED CGCC. PERFORMED INSTALLATION TEST AND RESET. NO FAULTS INDICATED. NO DEFECTS NOTED. REMOVED MEL 2-145DC-C. CLEARED MIC. (M)