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The Airbus numbering system is an alpha numeric model number followed by a dash and a three digit number
The model number often takes the form of the letter "A" followed by a '3', a digit, then followed normally by a '0', for example A380. There are some exceptions such as: A318, A319, A321 and A400M. The succeeding three digit number represents the aircraft series, the engine manufacturer and engine version number respectively. To use an A320-200 with International Aero Engines (IAE) V2500-A1 engines as an example; The code is 2 for series 200, 3 for IAE and engine version 1, thus the aircraft number is A320-231.
An additional letter is sometimes used. These include, 'C' for a combi version (passenger/freighter), 'F' for a freighter model, 'R' for the long range model, and 'X' for the enhanced model.
Code Manufacturing company
0 General Electric (GE)
1 CFM International (GE/SNECMA)
2 Pratt & Whitney (P&W)
3 International Aero Engines (R-R, P&W, MTU, Kawasaki, Mitsubishi, and Ishikawajima-Harima)
4 Rolls-Royce (R-R)
6 Engine Alliance (GE and P&W)