What was found
ON DESCENT AIRCRAFT ATTEMPTED TO LEVEL OFF AT 11000 FEET. THE AUTOPILOT KICKED OFF, AT THAT POINT WE HAD NO MANUAL CONTROL OF THE AIRCRAFT EXCEPT LONGITUDINAL. FLIGHT CONTROLS BROKE FREE AFTER FLT CREW WORKED CONTROLS. REGAINED AIRCRAFT CONTROLS UPON HAND FLYING AIRCRAFT. CONTROLS FELT HEAVY. REMOVED AND REPLACED BOTH LEFT AND RIGHT SLANT PANEL GASKETS, LEAK CHECK GOOD IAW MM 53-32-02 REF NRWC N156660 AND N156662.