What was found
IAD/GBM - FLT 6249 - DURING CRUISE AT 2250 HOURS ON 8-6-97, MADE AN UNSCHEDULED LANDING DUE TO RT ENGINE RPM GOES TO 102 PERCENT - 103 PERCENT WHEN POWER LEVERS MOVED BACK. ENGINE WAS SHUT DOWN. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND FOUND CENTER SHAFT LINKAGE ON FCU TO HAVE A BURR AND CATCHING ON GOVERNOR LINKAGE. MAINTENANCE REMOVED BURR AND RE-RIGGED FCU. OPS CHECK OK. AIRCRAFT RELEASED AND RETURNED TO SERVICE. (X)