What does the designation "TO 1-E-3A-1-1" primarily indicate in an Air Force Technical Order?

The designation "TO 1-E-3A-1-1" in an Air Force Technical Order primarily indicates the aircraft category. The format of the designation provides specific details that define the type of document and the aircraft it pertains to.

In this case, the "1" at the beginning signifies that it is the first aircraft type within the specified family of aircraft. The "E-3A" indicates the model of the aircraft, which is crucial for identification purposes within the inventory of various aircraft models. The subsequent numbers and letters provide additional information about the specific technical order series and version. This structured designation helps in categorizing the document accurately so that aircrew and maintenance personnel can easily reference the correct technical orders related to that aircraft model.