What was found
(CAN) MISSING WASHER ON OTBD WING FAIRING BOLT DURING THE INVESTIGATION OF AN ISSUE IN SERVICE, IT WAS NOTICED A MISSING WASHER ON THE INSTALLATION OF THE MAIN ROD 1005751802 WITH THE FLAP-FAIRING ATTACHEMENT, 1005751893 ON IML STRUCTURE OF FLAP-FAIRING ON SOME ACFT IN PRODUCTION. THIS MISSING WASHER CAN CAUSE A SHEARED BOLT, NAS6203-9H IN SERVICE.