FAA AC 120-110 PDF

PURPOSE.

a. This advisory circular (AC) calls attention to RTCA Document (RTCA/DO-329) Aircraft Secondary Barriers and Alternative Flight Deck Security Procedures, as guidance to achieve effective protection of the flight deck as required by Title 14 of the Code of Federal Regulations (14 CFR) part 121 § 121.584(1)(a).

b. This AC is not mandatory and does not constitute a regulation. It describes an acceptable means, but not the only means, to comply with pertinent regulatory requirements.