What was found
STUCK FLAPS AT 20 DEGREES. PHASE ONE PROCEDURES DID NOT SOLVE PROBLEM. FLIGHT PHASE WAS AFTER TAKEOFF. QRH PROCEDURE COMPLETED. LANDED WITH FLAPS 40 DEGREES DURING ATB SYS 1 & SYS 2 FLAPS FAULTED ON OVERHEAD PANEL & ECAM. CHECKED SPCC 1 & 2, FOUND BOTH SHOWING FLAPS JAM. RESET SPCC & RAN FLAPS UP TO ZERO. THEN OPERATED FLAPS TO FULL DOWN & THEN FULL UP WITH NO JAMS OR FAULTS INDICATED. DRAINED & SERVICED THE LT WING FLAP GEARBOXES. CHECKED SERVICING ON THE LT WING FLAP SCREW JACKS. LUBRICATED LT WING FLAP CARRIAGE ASSEMBLY. SERVICED THE LT FLAP TORQUE LIMITER. ALL COMPONENTS WERE IN SERVICEABLE CONDITION NO DISCREPANCIES NOTED. RAN FLAPS UP & DOWN NUMEROUS TIMES WITH NO FAULTS.