When the FAA issues a notification to aircraft owners of a known safety deficiency with a specific model of aircraft, engine, avionics, or other system, this notice is called a(n):


Airworthiness Directive (AD)


Service Bulletin (SB)


Mandatory Service Bulletin (MSB)


Advisory Circular (AC)

If you enjoyed taking this interactive quiz and would like to see more like it, go to the AVweb Brainteaser page. And if you thought it was unfair, confusing, or a waste of time, we'd like you to tell us that, too. And if you have an idea for a subject that you think would make a good future Brainteaser quiz, be sure to let us know.