What was found
DFW - FLT 1789 - AFTER TAKEOFF TUL, GEAR UNSAFE MESSAGE WHEN LANDING GEAR RETRA CTED. RECYLED LANDING GEAR AND ALL INDICATIONS RETURNED TO NORMAL. AIRCRAFT PROCEEDED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED NOSE LANDING GEAR STRUT SCHRADER VALVE AND PACKING. SERVICED NOSE LANDING GEAR STRUT WITH OIL AND NITROGEN. ACCOMPLISHED NOSE LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)