What was found
TRACK ROLLER SLAT 1-3 900 RT - COMPLY WITH TASK CARD 27-630-809 RH TRACK ROLLER SEALED, TRACK 1-3, TOP FORWARD - SLAT 1. (C-CHECK) REMOVED AND REPLACED RT SLAT TRACK SEALED ROLLER TOP FORWARD 1-3 IAW AMM 27-81-43-400-801-A01. OPS TEST OF THE FLAP AND SLAT SYS 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.