What was found
DURING CLIMB, THE AIRCRAFT HAD A FAILURE MESSAGE OF FLAP SYSTEM, RETURNED TO DEPARTURE. AFTER AN UNEVENTFUL LANDING THE PILOT REPORTED A F/CTL FLAP LEVER NOT ZERO, AND A F/CTL FLAP SYS 2 FAULT, MAINTENANCE PERFORMED A FAULT ANALYSIS IAW TSM 27-51-00-810-805-A AND REPLACED THE COMMAND SENSOR UNIT 51CV IAW AMM 27-51-17 PB401, TESTED NORMAL, AND REPLACED THE SFCC 2, 22CV IAW AMM 27-51-34 PB401, OPS TESTED NORMAL.