What was found
AFTER TAKEOFF, DURING ASCENT TO FLIGHT LEVEL 24.0 NR 7 FLAP LED AND YELLOW LIGHTS STAYED ILLUMINATED DURING FLAP RETRACTION. IMPLEMENTED PROCEDURES IAW MM FOR TROUBLESHOOTING. MANUAL STATED TO PROCEED WITH FLIGHT IF LIGHT EXTINGUISHED. LIGHTS EXTINGUISHED. UPON REACHING FLIGHT LEVEL 24.0 SPEED .80 MACH LIGHTS FOR NR 7 SLAT LED AND YELLOW LIGHTS ILLUMINATED ON FO BACK PANEL. THE AIRCRAFT ROLLED SLIGHTLY TO THE RT. PILOT SLOWED AC TO 230 KNOTS AND DESCENDED TO FLIGHT LEVEL 17.0 AND RETURNED WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED NR 7 SLAT ACTUATOR IAW MM.