What was found
FLIGHT 3338 - CLE-PVD - AFTER TAKEOFF, RECEIVED 'GEAR DISAGREE' AND 'STEERING INOP' MASTER CAUTION MESSAGES. AFTER CLIMB-OUT AT 5000 FT, RAN QRH AND DETERMINED THE NOSE GEAR DID NOT RETRACT AFTER TAKEOFF. SELECTED GEAR LEVER TO DOWN POSITION. DECLARED AN EMERGENCY WITH ATC. LANDED WITHOUT INCIDENT. MAINTENANCE FERRIED TO SDF. FOUND NOSE STRUT NOT EXTENDING AND NOT SERVICED WITH NITROGEN. SERVICED STRUT AND PERFORMED GEAR SWINGS. OPS CHECK GOOD.