Advisory Circulars

Date Cancelled: 09-19-2008
Cancelled By: 25.981-2A

Provides guidance for certification of airframe ice protection systems on transport category airplanes.

Date Cancelled: 05-07-2004
Cancelled By: 25.1419-1A

Provides information and guidance concerning an acceptable means, but not the only means, of compliance with Parts 23, 25, 27, and 29 of the FAR as applicable for preventing hazardous effects, due to lightning, from occurring to electrical/electronic systems performing critical essential functions. This material is neither mandatory nor regulatory in nature and does not constitute a regulation. The applicant may elect to establish an alternative method of compliance that is acceptable to the FAA

Date Cancelled: 12-21-2006
Cancelled By: 20-136A

This advisory circular (AC) provides guidance for the flight test evaluation of transport category airplanes. This AC includes flight test methods and procedures to show compliance with the regulations contained in subpart B of Title 14, Code of Federal Regulations (14 CFR) part 25, which address airplane performance and handling characteristics. Part 25 has been amended significantly since the last revision of this AC and, likewise, guidance and policy have changed in many areas as experience has been gained. During this time period, technology has advanced as well, resulting in a need for new or modified test techniques. This revision, AC 25-7B, adds acceptable means of compliance for the regulatory changes associated with amendments 108, 109, and 115 to part 25, and a revised means of compliance for expansion of takeoff and landing data for higher airport elevations. Means of compliance associated with flight in icing conditions was removed as this material is now contained in AC 25-25.

Date Cancelled: 03-29-2011

Describes acceptable means for showing compliance with certain requirements of Title 14, CFR, of FAR 25.1329, Flight Guidance System. While Part 25 contains the airworthiness standards applicable to transport category airplanes, the guidance in this AC pertains to the functions of autopilots, as well as any interactions with stability augmentation and trim functions.

Date Cancelled: 07-17-2006
Cancelled By: 25.1329-1B

This Advisory Circular (AC) provides acceptable certification methods, but not necessarily the only acceptable methods, for demonstrating compliance with the crashworthiness requirements of part 25, as amended through Amendment 25-112, of Title 14 of the Code of Federal Regulations (14 CFR) for transport category airplanes. The guidance in this AC is not mandatory nor a regulation

Date Cancelled: 05-18-2009
Cancelled By: 25-17A

Provides an acceptable means of compliance with Part 23 of the FAR for type certification of certain small airplanes.

Date Cancelled: 06-21-2007
Cancelled By: 25-11A

Date Cancelled: 03-14-2000
Cancelled By: 25-22

This advisory circular (AC) sets forth a method of compliance with the requirements of Part 25 of the Federal Aviation Regulations (FAR) pertaining to installations of miscellaneous, nonrequired electrical equipment in transport category airplanes. It is for guidance purposes and provides an example of a method of compliance that has been found acceptable. Because the method of compliance presented in this AC is not mandatory, the terms "shall" and "must" used in this AC apply only to an applicant who chooses to follow this particular method without deviation. The applicant may elect to follow an alternate method provided the alternate method is also found acceptable by the FAA.

Date Cancelled: 07-22-2010

Sets forth acceptable means of compliance with the provisions of Part 25 of the Federal Aviation Regulations (FAR) dealing with the certification requirements of fuselage doors. Guidance information is provided for showing compliance with structural and functional safety standards for doors and their operating systems. The intent of the requirements and some acceptable means of compliance are discussed. Other means are acceptable if they meet the intent of the regulations. For the propose of showing compliance with section 25.783 of FAR, hatches and exits are also considered to be doors.

Date Cancelled: 04-25-2005
Cancelled By: 25.783-1A

Provides guidance material for acceptable means for demonstrating compliance with the provisions of part 25 of the FAR dealing with the design requirements for transport category airplanes to preclude the aeroelastic instabilities of flutter, divergence and control reversal.

Date Cancelled: 07-23-1998
Cancelled By: 25.629-1A

Date Cancelled: 06-06-1995

Date Cancelled: 03-31-1998

This advisory circular (AC) provides guidance for the flight test evaluation of transport category airplanes. This AC includes flight test methods and procedures to show compliance with the regulations contained in subpart B of Title 14, Code of Federal Regulations (14 CFR) part 25, which address airplane performance and handling characteristics. Part 25 has been amended significantly since the last revision of this AC and, likewise, guidance and policy have changed in many areas as experience has been gained. During this time period, technology has advanced as well, resulting in a need for new or modified test techniques. This revision, AC 25-7B, adds acceptable means of compliance for the regulatory changes associated with amendments 108, 109, and 115 to part 25, and a revised means of compliance for expansion of takeoff and landing data for higher airport elevations. Means of compliance associated with flight in icing conditions was removed as this material is now contained in AC 25-25.

Date Cancelled: 10-16-2012

Provides information and guidance regarding compliance with the provisions of Part 25 of the Federal Aviation Regulations applicable to dynamic testing of seats intended for use in transport category airplanes.

Date Cancelled: 01-10-2006
Cancelled By: 25.562-1B

Sets forth an acceptable means , but not the only means, of demonstrating compliance with the provisions of part 25 of the Federal Aviation Regulations (FAR) related to the minimum speed margin between design cruise speed and design dive speed for transport category airplanes.

Date Cancelled: 09-29-2000
Cancelled By: 25.335-1A

Date Cancelled: 10-22-2007
Cancelled By: 25.1357-1A

0Sets forth an acceptable means of compliance, but not the only means, for the installation approval of automatic landing systems in transport category aircraft, which may be used initially in Category II operations. Approval of these aircraft for use under such conditions will permit the accumulation of data for systems, which may be approved for Category IIIa in the future.

Date Cancelled: 07-13-1999

Sets forth an acceptable means for complying with rules governing the installation of inertial navigation systems in transport category aircraft.

Date Cancelled: 05-08-2012

Date Cancelled: 10-24-2008
Cancelled By: 25.795-2A

Date Cancelled: 10-24-2008
Cancelled By: 25.795-1A

Date Cancelled: 10-22-2007
Cancelled By: 25.869-1A

Date Cancelled: 10-22-2007
Cancelled By: 25.1353-1A

This advisory circular (AC) describes the compliance process for the “Enhanced Airworthiness Program for Airplane Systems/Fuel Tank Safety (EAPAS/FTS)” rule. That rule requires design approval holders (DAH) to develop instructions for continued airworthiness (ICA) consisting of maintenance and inspection tasks, intervals and procedures for the representative airplane’s electrical wiring interconnection system (EWIS) for each affected type design. The DAH must also review any fuel tank system ICA it has developed in compliance with Special Federal Aviation Regulation (SFAR) 88 in order to ensure compatibility with the EWIS ICA, including minimizing redundant requirements. The DAH must then submit the EWIS ICA to the FAA Oversight Office for review and approval.

Date Cancelled: 05-04-2007

This advisory circular (AC) provides information and guidance on acceptable methods, but not the only methods, for compliance with the requirements for 30-second OEI and 2-minute OEI rotorcraft turbine engine ratings in part 33 of Title 14 of the Code of Federal Regulations (14 CFR Part 33).

Date Cancelled: 06-11-2009
Cancelled By: 33-7A