Replaces AC 120-56. Provides information and guidance that may be used by certificate holders, production approval holders, indirect air carriers, and foreign air carriers disclosing apparent violations to the FAA of regulations in 14 CFR parts 21, 107, 108, 109, 121, 125, 129 (security program violations only), 133, 135, 137, 141, 142, 145, & 147 under the self-disclosure program.

Informs owners and operators about the usefulness of manufacturers’ maintenance manuals for servicing, repairing, and maintaining aircraft, engines and propellers.

This advisory circular (AC) provides aircraft operators with information and guidance for assistance in compliance to Title 14 of the Code of Federal Regulations (14 CFR) part 91, section 91.21.

Provides technical information to persons conducting a visual inspection of aircraft. The procedures presented in this AC are an acceptable means, but not the only means, for conducting visual inspections and inspection programs.

Provides information and guidance on continuous airworthiness maintenance programs for operators subject to the provisions of FAR Parts 121, 127, or 135.

Provides guidance to assist persons in obtaining and maintaining Federal Aviation Administration certification of an AMTS.

This revised advisory circular (AC) clarifies the administrative procedures to ensure that applications for the Charles Taylor “Master Mechanic” Award are properly submitted and processed.

This advisory circular (AC) provides suggestions and safety related recommendations primarily to assist amateur and ultralight builders in developing individualized aircraft flight-test plans.

Alerts the aviation community to the potential hazards created by unintentional keying of microphones resulting in radio transmissions from airborne, mobile, and ground based radio transmitters and gives guidance on alleviating ensuing hazards.

Describes a system for the voluntary accreditation of civil aircraft parts distributors on the basis of voluntary industry oversight and provides information that may be used for developing accreditation programs.

Provides information concerning an acceptable means, but not the only means, that should be used by repair station certificate holders in the U.S. to obtain Joint Aviation Authorities (JAA) and foreign National Aviation Authority (NAA) acceptance under the provisions of Maintenance Implementation Procedures (MIP) concluded pursuant to a Bilateral Aviation Safety Agreement.

Provides information and guidance concerning an acceptable means, but not the only means, that may be used by a Joint Aviation Authorities (JAA) Approved Maintenance Organization (AMO) to obtain, renew, or amend a FAR Part 145 repair station certificate under the provisions of Maintenance Implementation Procedures (MIP) concluded pursuant to a Bilateral Aviation Safety Agreement (BASA).

Provides information and guidance concerning an acceptable means, but not the only means, of demonstrating compliance with the requirements of 14 CFR parts 21, 43, 121, 125, 127, 135, and 145 regarding procedures and facilities for repairs and alterations of structures consisting of metal-bonded and fiber-reinforced materials (e.g., carbon, boron, aramid, and glass-reinforced polymeric materials mentioned in AC 20-107, Composite Aircraft Structures).

This advisory cireular (AC) provides information relative to establishing methods acceptable to the Administrator for compliance with the additional maintenance requirements of the Federal Aviation Regulations (FAR) Part 135 as amended for certain air taxi operators and commercial operators (ATCO).

This advisory circular (AC) provides instructions for completing Federal Aviation Administration (FAA) Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance).