What was found
(CAN) AC LANDED, ON ROLL-OUT, WAS OBSERVED TO HAVE SMOKE ISSUING FROM UNDERSIDE OF AC. TOWER ADVISED CREW AND CALLED OUT AFF. RT MAIN GEAR WAS FULLY ENGULFED IN HEAVY SMOKE. SMOKE WAS BROUGHT UNDER CONTROL AND AC PASSENGERS AND CREW EVACUATED ONTO RUNWAY. MAINT REPORTED THAT A/C HAD A NR 3 BRAKE HYD LINE LEAK, WHICH CREATED A LOT OF SMOKE ON CONTACT WITH BRAKES. AC HAS APPROXIMATELY 55,500 HOURS AND 49,000 CYCLES. BRAKE LINE WAS REPAIRED AND A/C FERRIED TO BASE FOR FURTHER MAINTENANCE. MAINTENANCE INVESTIGATION ONGOING. AIRCRAFT REMAINS OUT OF SERVICE. BRAKE ASSEMBLY WILL BE SENT TO MFG FOR ANALYSIS, TEARDOWN REPORT AND DETAILS OF INVESTIGATION REQUESTED. WILL FOLLOW UP SDR PENDING VENDOR RESULTS.