Advisory Circulars

Provides guidance for airman applicants, training organizations, designated examiners, and aviation safety inspectors in determining English language skills required for airman certification under Title 14 of the Code of Federal Regulations (14 CFR) parts 61,63 and 65.

This AC describes an acceptable means, but not the only means, to comply with the requirements for identifying S-LSA and E-LSA with identification (ID) plates, displaying nationality and registration marks, and displaying placards. This AC also provides marking guidance for instruments necessary for the safety of flight.

This advisory circular (AC) provides information about Title 14, Code of Federal Regulations (14 CFR) part 45, Identification and Registration Marking. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to comply with the requirements for the installation, removal, or change of identification data and identification plates on aircraft engines. However, if you use the means described in the AC, you must follow it in all important respects.

a. This advisory circular (AC) provides information about Title 14, Code of Federal Regulations (14 CFR), part 45, Identification and Registration Marking. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to comply with the requirements for identifying aircraft, aircraft engines, or propellers with identification plates, and marking aircraft with nationality and registration marks. However, if you use the means described in the AC, you must follow it in all important respects.

b. A list of other related sections of 14 CFR and related publications, and definitions pertinent to this AC are located in the appendixes to this AC.

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

This advisory circular (AC) contains methods, techniques, and practices acceptable to the Administrator for the inspection and repair of nonpressurized areas of civil aircraft, only when there are no manufacturer repair or maintenance instructions. This data generally pertains to minor repairs. The repairs identified in this AC may only be used as a basis for FAA approval for major repairs. The repair data may also be used as approved data, and the AC chapter, page, and paragraph listed in block 8 of FAA form 337 when:

a. the user has determined that it is appropriate to the product being repaired;

b. it is directly applicable to the repair being made; and

c. it is not contrary to manufacturer’s data.

This advisory circular (AC) provides information and guidance concerning an acceptable means, but not the only means, of demonstrating compliance with the requirements of Title 14 of the Code of Federal Regulations (14 CFR) parts 21, 23, 25, 26, 27, 29, 31, 33, 35, 43, 91, 121, 125, (U.S.-registered airplanes), 135, 137, and 145 regarding procedures and facilities for repairs and alterations of structure consisting of adhesively bonded (including metal bond) and fiber-reinforced materials (e.g., carbon, aramid, and glass-reinforced polymeric materials mentioned in the current edition of AC 20-107, Composite Aircraft Structure). The information in this AC is applicable to repairs and alterations of bonded and composite structure, whether it is a damaged part that can be removed from the airplane for repairs, or repairs and alterations on the aircraft itself. Examples include repair patches, on-wing bonded repairs, and fabrication and bonding of replacement parts. The Federal Aviation Administration (FAA) will consider any other method of compliance that the applicant elects to present. This AC uses mandatory terms such as "must" only in the sense of ensuring the applicability of these particular methods of compliance when using the acceptable means of compliance (AMC) described herein. This AC does not change regulatory requirements and does not authorize changes in, or deviations from, regulatory requirements.

This advisory circular (AC) provides information and guidance on developing procedures for part marking and part re-marking when performing maintenance, alteration, and fabrication, including the fabrication of owner- or operator-produced parts.