B737 Undifferentiated or Other Model
Flight Crew Last 90 Days 225; Flight Crew Total 20000; Flight Crew Type 9500
Time Pressure
Aircraft Equipment Problem Critical
General Maintenance Action
Aircraft
After being cleared for a visual approach; with aircraft at 2;000 feet and 6 DME; intercepting final approach; autopilot was disconnected at which time the ailerons were found to be extremely stiff. Because of the proximity to landing and the aircraft being configured for same; I determined that there was no time to waste declaring an emergency and that using the time to have a crew plan was the best option.  We were also concerned that the unknown cause might grow worse. Landing was made with no incident; Maintenance was notified and debriefed.
Descent into ZZZ and being cleared for visual approach; Captain disengaged autopilot as we joined approximately 6 mile straight in final. Captain conveyed to me that the ailerons seemed 'stiff.' The aircraft was under complete control and there were no abnormal system indications i.e. Hydraulics or Flight Control System faults. Because of short distance to airfield; time constraints; and aircraft configuration Captain decided not to declare an emergency. The aircraft was controllable. Normal landing.
B737 flight crew reports stiff ailerons when the autopilot is disengaged at 2;000 feet during approach. The approach is continued to a normal landing and maintenance is notified.