What was found
DEPARTING ASPEN, EVERYTHING NORMAL DURING INITIAL CLIMB. CAPTURED FLIGHT LEVEL 230 WITH AUTOPILOT ENGAGED, AS THE PLANE ACCELERATED, THE FORWARDED TRIM REACHED ITS LIMIT AND THE AUTOPILOT DISENGAGED AND PLANE BEGAN TO CLIMB. PILOT TOOK MANUAL CONTROL TO RETURN TO ALTITUDE. IT TOOK CONSIDERABLE FORWARD PRESSURE ON YOKE TO KEEP PLANE FROM CLIMBING. PILOT REDUCED THE SPEED TO APPROXIMATELY 180 KNOTS TO REDUCE LIFT OF WINGS TO HAVE BETTER PITCH CONTROL. PILOT DECIDE TO DIVERT TO SALT LAKE CITY AND LANDED WITH ZERO FLAPS, THE LANDING WAS SOFT AND UNEVENTFUL.