What was found
FLT 1448 - PIT-PHL - AFTER TAKEOFF, EXPERIENCED SEVERE NOSE GEARVIBRATION AND UNSAFE INDICATION ON NOSE GEAR. CYCLED GEAR, NO CHANGE.AFTER RETRACTING MAIN GEAR DOORS, GOT DOWN AND LOCKED INDICATION ON NOSEGEAR. RETURNED TO FIELD. REPLACED LEFT AND RIGHT NOSE GEAR FORWARD DOORACTUATOR LINKS. (M)