What was found
IN FLT, GEAR UP, & FLAPS RETRACTED, A PRONOUNCED GRINDING/BINDING OF ELEVATOR WHEN YOKE IS MOVED FORE & AFT. NOTICABLE WHEN HAND FLYING BETWEEN 160KIAS & 220 KIAS. THERE IS SOUND ASSOCIATED WITH THE GRINDING AS WELL AS BEING ABLE TO FEEL IT IN THE FLOORBOARDS (COCKPIT), AND IN YOKE. ONLY IN FLIGHT. REMOVED FOUR PULLEYS FROM ELEVATOR CABLE SNUBBER DUE TO FLAT SPOTTED. INSTALLED NEW PULLEYS & ADJUSTED SNUBBER. BREAK OUT FRICTION IAW MM 27-31-03. OPS CHECKED GOOD. ELEVATORS HAVE SMOOTH OPERATION.