What was found
AFTER T/O & GEAR UP SELECTED, CREW HEARD A LOUD THUD IN NOSE AREA. GEAR IND SHOWED AN UNSAFE CONDITION, GEAR SELECTED DOWN & 3 GREENS WERE OBTAINED FOR DOWN & LOCKED. DURING FLYBY, OBSERVED NLG TO BE PERPENDICULAR TO STRAIGHT. DECIDED TO FLY TO MAIN BASE. IT APPEARS THAT THE N/G CENTERING BOLT BROKE AT THE HEAD AND CAUSED THE CENTERING ROLLER TO BECOME JAMMED IN THE CENTERING CAM, NOT ALLOWING THE SPRING STRUT TO CENTER THE NOSE GEAR. ALL OF THE DAMAGED PARTS WERE REPLACED, INCLUDING THE CENTERING SPRING STRUT AND GEAR SWINGS ACCOMP TO ENSURE SERVICEABILITY. THE REMAINING 2 A/C IN THE FLEET WERE ALSO CHECKED AND FOUND WITH NO FAULTS. RAYTHEON A/C HAS BEEN CONSULTED ON THE BOLT BREAKAGE ISSUE.