What was found
AIRCRAFT WAS GROUNDED: DURING APPROACH FLAPS DID NOT MOVE PAST FLAPS ONE. AFTER REACHING FLAPS ONE FLAPS WOULD NOT EXTEND FURTHER OR RETRACT REGARDLESS OF FLAP HANDLE POSITION. COMPLIED WITH QRH USED ALTERNATE EXTENSION METHOD TO FLAPS 15 FOR LANDING AND FLAPS LEFT THERE AFTER LANDING. PERFORMED TROUBLESHOOTING IAW B737 FIM 27-51-00-810-836. FSEU BITE CHECK GOOD. OPERATIONAL TEST WITH THE PRIMARY CONTROLS CHECKGOOD, NO TORQUE BRAKE INDICATORS TRIPPED. NO DEFECTS NOTED, NO 30 DAY HISTORY. A/C OK FOR SERVICE MCT 809365.