What was found
(CAN) NLG COLLAPSED DURING ROLLOUT AFTER LANDING. NO INDICATION OF PROBLEM UNTIL AFTER TOUCHDOWN. ROD ASSEMBLY, LANDING GEAR LOCK, NOSE, PN 41949-00, WAS FOUND FRACTURED AT ROD END. TSB ASSESSED CONDITION AS "CONSISTENT WITH FAILURE IN OVERLOAD". UNABLE TO DETERMINE CAUSE OF OVERLOAD. INITIAL LOG SEARCH DOES NOT SHOW REPLACEMENT OF THE ROD ASSY WITHIN THE PAST 5 YEARS.