An All Nippon Airways (ANA) Boeing 767 arriving from Shanghai came within approximately 70 feet (20 meters) of a Japan Civil Aviation Bureau (JCAB) flight inspection aircraft while on final approach. At the same time, the JCAB-operated Cessna CJ4 had just departed Runway 06 to conduct a scheduled flight inspection around Haneda. For its part, the JCAB CJ4 flight inspection aircraft briefly halted its climb and descended to 900 feet, passing below the ANA 767, before proceeding with its mission across Tokyo Bay. What Is A Flight Inspection Aircraft? Credit: JCABFlight inspection aircraft perform one of aviation's least visible — but most important — safety functions.