What was found
DURING FLAP/SLAT EXTENSION, SLATS STUCK BETWEEN 15 DEG AND 30 DEG WOULD NOT RETRACT. INSTALLED NEW NR 1 RT SLAT JACKSCREW AND INBD SECTION OF TORQUE TUBE WITH NEW U-JOINT REF AMM 27-84-22-4 AND SMP, STILL REQUIRES RII FOR INSTALLATION AND OPS CK.