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Thread: Is there any logic behind the yyy number in the 7x7-yyy format
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Old Nov 28, 2011 | 8:34 am
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BearX220
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Originally Posted by Upstate
I see these numbers 7x7-yyy and always wondered what the yyy means. Obviously bigger means a bigger plane, but is there some value that the number is derived from?
Here are all the codes listed for you:

http://www.airlinecodes.co.uk/boeing.asp

Hence a Boeing 747-438 was a 400 series 747 delivered to Qantas, a Boeing 707-321 was a 300 series 707 delivered to Pan Am, etc.
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