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Why 4 instead of 7?

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mcmxl
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Joined: Aug 20, 2005
Posts: 142
Location: Colorado
Posted: Tue Aug 15, 2006 7:09 pm 
Just out of curiosity why is 737 change to 734, and 747 changed to 744. I use to think it was a typo, but I see it often enough I am wondering if there is a reason.
Mr. McConnaughey

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cheechm
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Joined: Apr 26, 2006
Posts: 312
Location: My Home, London, United Kingdom
Posted: Tue Aug 15, 2006 7:14 pm 
mcmxl wrote:
why is 737 change to 734


I believe that only 737-400 is change to 734. For instance 737-200 would become 732.


mcmxl wrote:
and 747 changed to 744


This is also because it is 747-400.


Nick
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mcmxl
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Posted: Tue Aug 15, 2006 7:15 pm 
Thanx, Cheechm, that makes sense.
Mr. McConnaughey

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99jolegg
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Joined: Jun 26, 2004
Posts: 5429
Location: UK
Posted: Tue Aug 15, 2006 7:19 pm 
cheechm wrote:
mcmxl wrote:
why is 737 change to 734


I believe that only 737-400 is change to 734. For instance 737-200 would become 732.


mcmxl wrote:
and 747 changed to 744


This is also because it is 747-400.


Nick
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Yes Its just a method of condensing 747-400 (for example), which is 6 digits and a hypen, into 744 - just 3 digits. You can do the same with Airbus - A346 / A345 etc.
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pilotwannabe
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Joined: Mar 15, 2006
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Location: A galaxy far far away
Posted: Tue Aug 15, 2006 7:55 pm 
Check out the ICAO code column Arrow

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TimH
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Joined: Aug 20, 2006
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Location: Ireland, 31nm from EIDW
Posted: Tue Aug 22, 2006 10:56 pm 
Also in the case of the 737-700, where just typing 737 wouldnt be very informative, 73G is used to denote 737-700
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