What was found
ACFT EXPERIENCED A NR 1 ENGINE COMPRESSOR VANE FAULT ON ECAM, THE FLIGHT CREW ELECTED TO RETURN TO DEPARTURE. UPON ARRIVAL TECHS ACCOMPLISHED TSM 75-30-00-810-801-A. THE VBV BALL SCREW ACTURATOR WAS FOUND FAULTY AND REPLACED IAW AMM 75-31-50, THE ASSOCIATED FLEXIBLE DRIVE SHAFTS WERE ALSO REPLACED. ENGINE MOTORING TEST AMM TASK 73-29-00-710-040 AND ENGINE IDLE RUN ACCOMPLISHED WITH NO FAULTS FOUND. THE ACFT WAS RETURNED TO SERVICE, NO FAULTS REPAORTED ON SUBSEQUENT FLIGHT.