ATA numbering system

An aircarft has a lot of parts, manufacturing them is one thing maintaining them is some other level challange. Thus to describe what needs to be done for what part requires a lot of documentation.

The easy way engineers have come up is to name each section of the aircraft as different title numbers.

ATA- Air Traffic association. It was created by people in ATA so called ATA chapters. with 100 chapters ATA

So when some one says ATA chapter 72 it will always mean engine.

ATA 27 flight controls

ATA 32 landing gear

ATA 72 is engine

and so on

If we go even deeper.

ATA 72-00-01 is fan module

ATA 72-00-02 is core module

ATA 72-00-03 is HPT Module

ATA 72-00-04 is LPT module

ATA 72-00-05 is AGB module

and so on

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