What was found
PILOT COMPLAINED THAT IN A HIGH SPEED DESCENT, THE AUTOPILOT WOULD NOT MAINTAIN CONSTANT AIRSPEED. IN INSPECTING THE AIRCRAFT, THE ELEVATOR CABLES WERE SET 35 POUNDS ABOVE MAXIMUM TENSION SETTING AND WITH THE ELEVATOR'S PIN IN THE NEUTRAL POSITION, THE LEFT ELEVATOR WAS IN THE NEUTRAL POSITION, BUT THE RIGHT ELEVATOR WAS ONE INCH ABOVE NEUTRAL. RECENTERED TORQUE TUBE AND REPLACED A SHIM. P/N: AN960D516L BETWEEN THE BEARING. RESET ALL CABLE TENSIONS TO SPECS.