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Number Office Title Date
20-41A AIR-120 Substitute Technical Standard Order (TSO) Aircraft Equipment
Sets forth an acceptable means for complying with rules governing aircraft equipment installations in cases involving the substitution of technical standard order equipment for functionally similar TSO approved equipment.
04-05-1977
21-34 AIR-120 Shoulder Harness-Safety Belt Installations
Provides information and guidance pertinent to an acceptable means, but not the only means, for installation of shoulder harness and safety belt restraint systems at all seat locations on all previously type-certificated aircraft.
06-04-1993
20-104 AIR-120 Revised Powerplant Engineering Report No. 3A Standard Fire Test Apparatus and Procedure (for Flexible Hose Assemblies)
Announces the availability of the subject report.
07-19-1978
91-44A AIR-120 Operational and Maintenance Practices for Emergency Locator Transmitters and Receivers
Combines and updates material in several Advisory Circulars on the subject of emergency locator transmitters (ELT) receivers for airborne service.
12-12-1980
20-56A AIR-120 Marking of TSO-C72b Individual Flotation Devices
Outlines acceptable methods for marking individual flotation devices which also serve as seat cushions
04-01-1975
20-170 AIR-120 Integrated Modular Avionics Development. Verification, Integration and Approval using RTCA/DO-297 and Technical Standard Order C153

This advisory circular (AC) shows you how to obtain Federal Aviation Administration (FAA) airworthiness approval for the development, verification, and integration of an integrated modular avionics (IMA) system for installation into an aircraft or engine.  We cite RTCA, Inc. document RTCA/DO-297, Integrated Modular Avionics (IMA) Development Guidance and Certification Considerations, dated November 8, 2005 and supplement it with this text.  This AC also provides guidance on how to show compliance with Technical Standard Order (TSO)-C153, Integrated Modular Avionics Hardware Elements.

This AC is not mandatory and does not constitute a regulation.  In it, we describe an acceptable means, though it is not the only means, to obtain FAA approval of IMA systems.    

This AC uses the terminology “should” when discussing compliance to the AC itself, as the AC represents one, but not the only, method of complying with the regulations.   This AC uses the term “must” when discussing compliance to the regulations, as compliance to a regulation is not optional.  In these cases, the AC text supplies, in square brackets, a reference to the specific rule(s) being discussed.

10-28-2010
25-5 AIR-120 Installation Approval on Transport Category Airplanes of Cargo Unit Load Devices Approved as Meeting the Criteria in NAS 3610
Sets forth an acceptable means, but not the sole means, of complying with the requirements of the Federal Aviation Regulations (FAR’s) applicable to the installation on transport category airplanes of cargo load devices approved as meeting the criteria in NAS 3610.
06-03-1970
21-22 AIR-120 Injury Criteria for Human Exposure to Impact
Describes a range of impact trauma which may be used to establish bases for acceptance levels or performance criteria in the evaluation of occupant survivability characteristics in civil aircraft.
06-20-1985
20-157 AIR-120 How to Prepare Reliability Assessment Plans for Aircraft Systems and Equipment
This AC shows you how to develop and use a reliability assessment plan. An assessment plan documents the controlled, repeatable processes for assessing the reliability of aircraft and engine electronic and electrical systems, including their electromechanical elements and equipment
01-19-2007
20-42D AIR-120 Hand Fire Extinguishers for Use in Aircraft

This advisory circular (AC) gives you guidance for the fire-fighting effectiveness, selection and safe-use of hand fire extinguishers in airplanes and rotorcraft. In it we will also show you how to gain Federal Aviation Administration (FAA) approval of hand fire extinguishers for aircraft.

01-14-2011
20-100 AIR-120 General Guidelines for Measuring Fire-Extinguishing Agent Concentrations in Powerplant Compartments
Describes the installation and use of a model GA-2A fire extinguisher agent concentration recorder in determining the distribution and concentration of fire-extinguishing agents when discharged in an aircraft powerplant compartment.
09-21-1977
21-49 AIR-120 Gaining Approval Of Seats With Integrated Electronic Components

a.  This AC explains how to gain approval of aircraft seats with integrated electronic components and installed on aircraft.  In it, we focus primarily on seats approved to a technical standard order (TSO).  This AC applies to electronic components integrated into aircraft seats only.  We don’t cover electronic components installed independent of the seat. 

 b. This AC is not mandatory and does not constitute a regulation.  In it, we describe an acceptable means, though it is not the only means, to gain approval to install electronic components integrated in seats on aircraft.  However, if you use the means described in the AC, you must follow it in all important respects.

02-09-2011
20-119 AIR-120 Fuel Drain Valves
Provides an acceptable means, but not the only means, of compliance with the requirements of the FARs for positive locking of fuel drain valves in the closed position.
02-07-1983
20-71 AIR-120 Dual Locking Devices on Fasteners
Provides guidance and acceptable means, not the sole means, by which compliance may be shown with the requirements for dual locking devices on removable fasteners installed in rotorcraft and transport category airplanes.
12-08-1970
20-174 AIR-120 Development of Civil Aircraft and Systems

This advisory circular (AC) recognizes the Society of Automotive Engineers (SAE) Aerospace Recommended Practice (ARP) 4754A, Guidelines for Development of Civil Aircraft and Systems, dated December 21, 2010, as an acceptable method for establishing a development assurance process. SAE ARP 4754A discusses the development of aircraft and systems taking into account the overall aircraft operating environment and functions. This includes validation of requirements and verification of the design implementation for certification and process assurance.

09-30-2011
20-175 AIR-120 Controls for Flight Deck Systems

This advisory circular (AC) provides guidance for the installation and airworthiness approval of flight deck system control devices, from primarily a human factors perspective.  It does not address primary flight controls, secondary flight controls, or controls that are not located in the flight deck.   This AC addresses traditional dedicated controls such as physical switches and knobs, as well as multifunction controls such as touch screens and cursor control devices. 

12-08-2011
20-69 AIR-120 Conspicuity of Aircraft Instrument Malfunction Indicators
Provides design guidance information on methods of improving conspicuity of malfunction indication devices.
05-14-1970
20-168 AIR-120 Certification Guidance for Installation of Non-Essential, Non-Required Aircraft Cabin Systems & Equipment (CS&E)

This AC provides the primary certification guidance on how to meet the airworthiness requirements for installation of non-essential, non-required aircraft cabin systems & equipment (CS&E). We incorporate in this AC the guidance in RTCA, Inc. document RTCA/DO-313, Certification Guidance for Installation of Non-Essential, Non-Required Aircraft Cabin Systems & Equipment, dated October 2, 2008. We also clarify certain guidance in RTCA/DO-313. (See paragraph 6.)  

 

This AC is not mandatory and does not constitute a regulation. In it we describe a means, though it is not the only means, for manufacturers and installers to show their equipment design and installation performs its intended function. If you use the means described in this AC, however, you should follow it in all respects.

 

 

07-21-2010
21-25A AIR-120 Approval of Modified Seats and Berths
Provides information on approvals required for modifications to TSO’d seating systems. This revision incorporates guidance regarding TSO-C127 seating systems and additional information on marking and flammability testing requirements.
06-03-1997
20-171 AIR-120 Alternatives to RTCA/DO-178B for Software in Airborne Systems and Equipment

On January 11,1993, we, the Federal Aviation Administration (FAA), published Advisory Circular (AC) 20-115B recognizing RTCA/DO-178B, Software Considerations in Airborne Systems and Equipment Certification, dated December 1, 1992, as a means, but not the only means, to seek FAA approval of airborne software. RTCA/DO-178B is recognized by industry and certification authorities as an accepted approach for assuring that software in airborne systems and equipment has been developed to meet the safety objectives of the regulations.

 

This AC identifies what you, as an applicant, will have to address and document when you propose an alternative approach to that defined in RTCA/DO-178B. This AC is intended to provide you, the applicant, with guidance on how to establish that your proposed alternative provides the same level of assurance as that provided in RTCA/DO-178B for airborne software.  Your proposed alternative should be evaluated in conjunction with the certification process and applied to airborne systems and equipment (containing software) for which you are seeking FAA approval in order to obtain a Type Certificate, Supplemental Type Certificate, Amended Type Certificate, or Amended Supplemental Type Certificate.

01-19-2011
20-74 AIR-120 Aircraft Position and Anticollision Light Measurements
Contains useful information concerning measurements for intensity, covering, and color of aircraft position and anti-collision lights.
07-29-1971
20-30B AIR-120 Aircraft Position Light and Anticollision Light Installations
Sets forth acceptable means, but not the only means, of showing compliance with the Federal Aviation Regulations (FAR) applicable to installed position lights and anti-collision lights.
07-20-1981
20-73A AIR-120 Aircraft Ice Protection
Provides information relating to the substantiation of ice protection systems on aircraft.
08-16-2006
20-67B AIR-120 Airborne VHF Communication Equipment Installations 01-16-1986
20-115C AIR-120 Airborne Software Assurance

a. This AC describes an acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification. This AC is not mandatory and is not a regulation. Other ACs may describe alternate means.

b. We, the Federal Aviation Administration (FAA), wrote this AC to recognize the following RTCA, Inc. documents (RTCA DO):

 (1) RTCA DO-178C, Software Considerations in Airborne Systems and Equipment Certification, dated December 13, 2011.

(2) RTCA DO-330, Software Tool Qualification Considerations, dated December 13, 2011.

(3) RTCA DO-331, Model-Based Development and Verification Supplement to DO­178C and DO-278A, dated December 13, 2011.

(4) RTCA DO-332, Object-Oriented Technology and Related Techniques Supplement to DO-178C and DO-278A, dated December 13, 2011.

(5) RTCA DO-333, Formal Methods Supplement to DO-178C and DO-278A, dated December 13, 2011.

Note: RTCA DO is hereafter referred to as DO.

c. References to use of DO-178C in this AC include use of supplements and DO-330 as applicable.

d. This AC also establishes guidance for transitioning to DO-178C when making modifications to software previously approved using DO-178, DO-178A, or DO-178B.

07/19/2013 AC 20-115C

 

e. This AC also explains the use of DO-178C for Technical Standard Order (TSO) authorizations.

f. This AC does not obligate the FAA to approve any data or perform any activities as specified within the referenced RTCA documents.

 

g. If you use the means in this AC as a means of compliance, you must follow it entirely.

07-19-2013
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