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Thu Jul 08, 1999 1:43 am

Hi. I have a question in reference to what I assume are different airplane model numbers. Such as, with the 747. What is the difference between, say a 747-400 and a 747-412 or maybe a 747-436? Kind of a novice aviation question but I would appreciate some help. Thanks.
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Joined: Tue May 18, 1999 4:41 am

RE: 747-400

Thu Jul 08, 1999 1:53 am

The 747-4**, ** meaning the customer order #. Delta Airlines is 32. So if they ordered say a 747-400, the aircraft model number would be 747-432. They were assigned 15-25 years back. Some use them and some don't.

RE: 747-400

Thu Jul 08, 1999 2:38 am

Means airline number on the model. Also, if the aircraft is leased these numbers still stay on the record. That is why you see an airline with many different numbers such as 747-416, 432 etc. in their fleet.

These numbers are assigned to the airline the aircraft was originally built for.

Topic Author
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RE: 747-400

Thu Jul 08, 1999 12:38 pm

Hey, thanks for your help with answering my question guys:-)
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Joined: Wed May 19, 1999 7:00 am

RE: 747-400

Fri Jul 09, 1999 6:17 am

True. The ** in 747-4** is the customer number. Example: Singapore Airlines is 747-412 and British Airways is 747-436. That number stays with the aircraft forever. Say if British Airways sold one of thier 747-236s to Singapore Airlines, who, if they ordered the aircraft would be 747-212, it would still be a -236. Airbus however assigns their last two numbers by engine type.
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RE: 747-400

Fri Jul 09, 1999 6:51 am

I thoguht (eg. 767-30yb) wich is a twa plane means supper extend range or for like a 747-439= the inside config ?
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RE: 747-400

Sun Jul 11, 1999 7:34 am

It is a designation number Boeing gives to it's customers. For example, any American Airlines plane bought new from Boeing is given the designation-23
777-223, 757-223. United it -22, 747-422.
Get it?
« On ne voit bien qu'avec le cœur. L'essentiel est invisible pour les yeux » Antoine de Saint-Exupéry

RE: 747-400

Sun Jul 11, 1999 8:28 am

-412...that means that it is a series 400....The last 2 number are Boeings customer identification number...12 is Singapore Airlines.
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RE: 747-400

Sun Jul 11, 1999 10:46 am

ok...... is it the same thing for letter to be in codes like ive seen 737 be like 737-3b7 whats that mean
and dose anyone know what twa reg code is?
tnks matt
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Joined: Tue Jun 15, 1999 4:56 pm

RE: 747-400

Sun Jul 11, 1999 11:38 am

TWA is 7X7-*31, ex: 757-231.

As for 737-3b7, that is the Allegheny/USAir/USAirways designation.

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RE: 747-400

Mon Jul 12, 1999 3:28 am

What does it mean when it is an advanced model?

IE: 737-200 Advanced
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Joined: Thu Jun 24, 1999 7:26 am

Not Just A Number.

Tue Jul 13, 1999 9:19 am

It's nothing new that the two last numbers indicate the airline which orders the plane, but it lasts with the plane, because each airline orders their planes with different options, I have seen all kinds of different options on 727's, for example in the location of the engine fire lights, or the engine start, or even the thrust levers.


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