What was found
TRACK ROLLER SLAT 2-2 900 RT - COMPLY WITH TASK CARD 27-630-809 RT TRACK ROLLER SEALED, TRACK 2-2, TOP FORWARD - SLAT 2. (C-CHECK) REMOVED AND REPLACED RT SLAT TRACK SEALED ROLLER TOP FORWARD 2-2 IAW AMM 27-81-43-400-801-A01. OPS TEST OF THE FLAP AND SLAT SYSTEM COMPLETED IAW AMM 27-50-00-710-801-A02. OPS TESTED BAD. WHEN FLAPS/SLATS RETURNED TO THE FULLY RETRACTED POSITION A FLAP HALF-SPEED INDICATION WAS DISPLAYED ON EICAS.