• 3 defintions found in Acronymia,
• 5 defintions found in AcroLexic: Acronyms and Abbreviations Dictionary:

JAA

Just Another Acronym

Joint Aviation Authorities

Joint Airworthiness Authority -- founded in 1970 to develop unified European approach to aviation safety; represents 27 European countries

AcroLexic: Dictionary of Acronyms and Abbreviations contains 2 more definitions of “JAA”.

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