What was found
PIT - FLT 865 - DURING APPROACH, CREW REPORTED THE NR 5 LEADING EDGE SLAT INTRANSIT LIGHT ILLUMINATED WHEN FLAPS/SLATS WERE SET TO 5 UNITS. CREW NOTED AIRCRAFT WANTED TO ROLL RT DURING FLAP/SLAT SET. NR 5 LEADING EDGE SLAT DID NOT RETRACT UNTIL APPROXIMATELY FOUR MINUTES AFTER TRAILING EDGE FLAPS RETRACTED AS PER COCKPIT INDICATION. FLT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 5 LEADING EDGE SLAT ACTUATOR PER MM 27-81-41. OPS CHECK AND LEAK CHECK GOOD.