What was found
(CAN) 1 HR INTO CRUISE AT FL 220 PILOT EXPERIENCED INSTANTANEOUS AURAL AND VISUAL WARNINGS OF MULTIPLE SYSTEMS FAILURE. CAUTION ADVISORY PANEL DISPLAYED PUSHER INOP, FLAPS INOP, AUTO PILOT FAIL; FLAP POSITION INDICATOR JUMPED FROM 0 DEG TO 40 DEG.ALSO INDICATING RED OVERSPEED, EADI FAILED TO RAW DATA ONLY ,GEAR INDICATOR LIGHTS WENT TO THREE RED/ UNSAFE,GEAR AND FLAP WARNING TONES AUDIBLE. AFTER APPX. 20 MIN. ALL SYSTEMS SUDDENLY REVERTED TO NORMAL EXCEPT FOR THE FLAPS WHICH REQUIRED A FLAP RESET BY MAINTENANCE FLAPS THEN FUNCTION NORMALLY.PILOT COMPLETED FLIGHT AT ZERO FLAP.MAINTENACE TROUBLESHOOTING IDENTIFIED ONE FAULT CODE ON A/C COMPUTER INDICATING A POSSIBLE FLAP CONTROL WARNING UNIT ERROR.THE FCWU WAS R