What was found
DEPARTING & DURING FLAP RETRACTION, RECEIVED AN ECAM ALERT "FLAPS VANE JAM". COMPLIED WITH QRH, CYCLED THE FLAPS, AND UNABLE TO FIX PROBLEM. RETURNED TO DEPARTURE. FOUND BOTH NR 1 & NR 2 SFCC'S FAULTED "LT VANE IN 2" ON ARRIVAL. RESET BOTH SFCC'S & RETRACTED FLAPS. ALSO CYCLED FLAPS TO 40 & FULLY RETRACTED WITHOUT ANY FAULTS. TROUBLESHOT IAW TSM 27-50-16 CHECKED ADJUSTMENT OF FLAP VANE DETECTOR UNIT 39CV ALL CHECKED NORMAL. R & R VANE RETRACTED SWITCH 39 CV PRECAUTIONARY BECAUSE BOTH SFCC FAULTED SAME SWITCH IAW M/M 27-56-15-05. C/W OPERATIONAL TEST OF FLAPS IAW M/M 27-54-00-05 ALL OPS CHECKS NORMAL A/C OK FOR SERVICE.