What was found
JFK - FLT 4838 - DURING FINAL APPROACH SEGMENT, ACFT ENCOUNTERED WAKE TURBULENCE FROM PRECEDING AIRBUS A340. ACFT ROLLED 35 DEG TO LEFT & AUTOPILOT DISCONNECTED. PILOT APPLIED CORRECTIVE INPUT AT WHICH POINT AILERONS DECOUPLED (SYS SPLIT). ROLL CORRECTED & FLT CONTINUED LANDING WITHOUT INCIDENT. MX PERFORMED ALL FUNCTIONAL & OPERATIONAL CHECKS WITH NO DEFECTS FND. ACFT RETURNED TO SERV. SDR IS TO CLOSE OUT SDR OF 7-25-95 IN WHICH WAKE TURBULANCE ENCOUNTERED CAUSING AILERON SYS TO DECOUPLE. INVEST FND NO DEFECTS WITH INTERCONNECT UNIT. TESTING PERFORMED WITH NEW UNIT & UNIT INSTALLED AT TIME OF INCIDENT, ALL WITHIN DESIGN REQUIREMENTS. ORIG INTERCONNECT STRUT REINSTALLED & ACFT RETNED TO SERV.(X)