What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: INFLIGHT THE AILERON CONTROL FEEL WENT SOFT WITH LITTLE RESISTANCE BUT THEN ALSO HAD INCREASES RESISTANCE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT CLT. FOLLOWED FIM 27-11-00-810-811. ACCOMPLISHED AILERON CONTROL WHEEL FORCE TEST, PER AMM 27-11-00-700-805. TEST PASSED. CHECKED AILERON ADJUSTMENT, PER AMM 27-11-00-820-801, RIG PINS AND CABLE TENSIONS GOOD. OPERATION OF AILERONS FEEL FINE THROUGH FULL TRAVEL AND AILERONS CENTER WELL. SUSPECT INTERMITTENT FAULT OR AIR BUBBLE IN HYDRAULIC SYSTEM. NO FAULT FOUND.