. . "MD 500E" . . "McDonnell Douglas MD-520N" . "MD-530F" . . . "McDonnell Douglas 500N helicopter" . "1967" . . "NH 500" . "369C" . . "MD520 NOTAR helicopters" . . "MD 500D" . . "Hughes MD 500E" . . "MD500 helicopter" . "MD 530F" . "Hughes 369E" . "MD 520" . "MD-369" . "MD Helicopter MD 500E" . "Hughes 500C" . "MD 500/530F" . "Hughes/MD 369" . "MD-520 MG" . . "MD530F" . "Boeing 500" . "MD Helicopters MD 530F" . . . "500MD" . "MD 520N" . . "McDonnell Douglas MD520N" . "MD 500 helicopters" . "MD_Helicopters_MD_500" . "Hughes 369" . . . "MD 500" . "MD 500D (369D)" . . "McDonnell Douglas MD 520N" . "MD Helicopters MD 500" . . "MD-530" . . . . "McDonnell Douglas MD500" . "McDonnell-Douglas 369E" . . . "McDonnell Douglas 500N Helicopter" . "MD500E" . "Hughes 369HS" . "MD500s" . . . . . "Hughes 500M" . "Hughes/McDonnell Douglas Model 500D" . "MD-530F helicopter" . . . . . "Hughes 369D, 500D" . "Hughes 500D" . . "MD 530F+" . "Hughes 396, 500C" . "MD 500/530" . "MD-500 series" . "helicopter" . . "MD Helicopters MD 530" . . . "MD 500M" . "McDonnell Douglas MD369E" . "Nardi Hughes NH-500MC / NH-500MD" . . . . . . "McDonnell Douglas 530" . . "Model 500" . "MD520N" . . "Breda Nardi" . . . . . "Hughes 500" . "Hughes 500" . . "MD500D" . "Hughes 369HE" . . "MD-500" . . . "MD Helicopters MD 500" . "MD Helicopters (McDonnell Douglas) MD500" . . "Hughes 500C Defender" . "MD 500C" . "OH-6D" . "MD-520MG Defender" . "Hughes/MD500" . "Hughes 369C" . . "MD Helicopters MD-530F Lifter and MD-500D" . . . "MD 530" . . "Model 500 Defender" . . "Hughes 369HS, 500C" . "MD 500 series" . "MD-500 helicopter" . . "4700" . "McDonnell Douglas 369 helicopter" . . "MD Helicopters MD 500#MD 520N" .