As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE POWER LEVER FREEZING UP AT ALTITUDE, 40,000 FT. EXTREMELY STIFF OPERATION AT ALTITUDE. ON DESCENT THROUGH 30,000 FT POWER LEVER FREED UP AND OPERATION WAS NORMAL. UPON INVESTIGATION FOUND POLYMER CONTROL CABLE SHEATH CRACKED IN THE BEND RADIUS OF CABLE TRANSITION TO THE POWER LEVER QUADRANT IN COCKPIT. REPLACE CABLE ASSEMBLY WITH NEW. PERFORMED CHECK FLIGHT ALTITUDE. NORMAL OPERATION AT THIS TIME.