What was found
AFTER TAKEOFF, DURING FLAP RETRACTION FROM FLAPS 1 TO FLAPS 0, HAD EICAS MESSAGE, LE FLAP ASYM, & AMBER LIGHT LE. RETURNED TO LAND IAW QRH FAULT CODE FRM 27 90 24 00. INSTALLED TORQUE TUBE COUPLER AND OPS CHECKED LEADING EDGE SLAT SYSTEM IN REF 27-81-00-5 AND OPS RIG CHECKED GOOD.