| Aircraft Subtype | Common Engine | DOC Identifier | | :--- | :--- | :--- | | A320-214 | CFM56-5B4 | A320F_CFM_Rev_12 | | A320-232 | IAE V2527-A5 | A320F_IAE_Rev_9 | | A320-251N | PW1127G-JM | A320N_NEO_DOC | Historically, the A320F DOC was a 10-kilogram suitcase of paper binders. Today, it lives on the EFB (Electronic Flight Bag). 2.1 The Modern DOC Structure If you download the official A320F DOC (often formatted as a .Pdf or .Zip file from AirbusWorld), you will typically find a folder structure like this: