What was found
AT APPROXIMATELY 1720Z IN CRUISE FLT AT FL430 DESCENDING TO FL370 IN MODERATE TURBULENCE, CONTROL LOCK ON WHITE CAS MESSAGE ILLUMINATED. FLT CONTROLS BECAME LOCKED & ACFT BEING BLOWN OFF COURSE. A/P DISENGAGED & CONTROL LOCK HANDLE JIGGLED IN UNLOCK POSITION UNTIL CAS MESSAGE WENT OUT. A/P ENGAGED & FLT CONTINUED WITHOUT FURTHER INCIDENCE. DURING GROUND STALL CHECK, CONTROL LOCK HAD TO BE CYCLED TWICE TO ALLOW CHECK TO INITIATE DURING PREFLT TEST. R & R AILERON PROX SENSOR WITH NEW. FLT CONTROL DID NOT BECOME LOCKED IN FLT IAW TEAM700. ADJUSTED ELEVATOR & AILERON TURNBUCKLES TO REMOVE PLAY OUT OF SYS. OPS CHECK GOOD. ALL WORK IAW AMM 27-70-00 & WM 27-70-01.