AD Aerospace has obtained a Validation of Supplemental Type Certificate (VSTC) from the Civil Aviation Administration of China (CAAC) for its CabinVu and CabinVu-123 Cockpit Door Monitoring Systems on Boeing 737 aircraft.  These systems help to protect the cockpit from hijackings by providing the pilots with a live view of the area outside the flight deck door. This VSTC covers the entire Boeing 737 family of aircraft using installation designs produced by Aircraft Engineering and Installation Services of Orlando, FL. CabinVu and CabinVu-123 provide pilots with a forward looking, clear and unobstructed view of the area outside the cockpit door and in the adjacent galleys from their usual seated positions.  A series of cameras are linked to either one or two monitors and associated controllers within easy reach of the pilots for ease and comfort of use.