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Standard

Contiguous Aircraft/System Development Process Example

2024-03-12
CURRENT
AIR6110A
This AIR provides a detailed example of the aircraft and systems development for a function of a hypothetical S18 aircraft. In order to present a clear picture, an aircraft function was broken down into a single system. A function was chosen which had sufficient complexity to allow use of all the methodologies, yet was simple enough to present a clear picture of the flow through the process. This function/system was analyzed using the methods and tools described in ARP4754A/ED-79A. The aircraft level function is “Decelerate Aircraft On Ground” and the system is the braking system. The interaction of the braking system functions with the aircraft are identified with the relative importance based on implied aircraft interactions and system availabilities at the aircraft level. This example does not include validation and verification of the aircraft level hazards and interactions with the braking system.
Standard

Aerospace Vehicle Wiring, Lessons Learned

2024-03-04
CURRENT
AIR6808A
This AIR is limited to the requirements of AS50881 and examines these requirements, providing rationale behind them. AS50881 is only applicable to the aircraft EWIS. Pods and other devices that can be attached to an aircraft are considered as part of the aircraft equipment design. Its scope does not include wiring inside of airborne electronic equipment but does apply to wiring externally attached to such equipment. The AS50881 scope does not include attached devices but does include the interface between the pod/equipment and aircraft wiring. Section 3.3.5 addresses components such as antennas and other similar equipment that were once supplied as Government Furnished Aeronautical/Aerospace Equipment (GFAE).
Standard

A Guide to APU Health Management

2023-09-15
CURRENT
AIR5317A
AIR5317 establishes the foundation for developing a successful APU health management capability for any commercial or military operator, flying fixed wing aircraft or rotorcraft. This AIR provides guidance for demonstrating business value through improved dispatch reliability, fewer service interruptions, and lower maintenance costs and for satisfying Extended Operations (ETOPS) availability and compliance requirements.
Standard

Hydrogen Fuel Cells for Propulsion

2023-05-22
WIP
AS7141
The scope of this new standard is the usage of hydrogen PEM fuel cells for generation of electrical power for the propulsion systems and for the airplane electrical systems that distributes for critical systems (primary power) such as flight controls, hydraulic, pneumatic and avionic. The standard shall cover all equipment, subsystems and installation, aspects that allow the hydrogen PEM fuel cell system to perform its intended function, such as energy buffering elements (batteries, supercaps, flying-wheels, etc), thermal management systems, flammable and fire zoning, drainage, vent, inerting, etc. Aspects associated with maintenance are also part of the scope. The Standard shall provide also an acceptable means for the certification of the hydrogen PEM fuel cell system in the intended context of usage, including aspects of calculations, simulations, analysis, lab, ground and flight testing as applicable.
Standard

Interface Standard, Miniature Mission Store Interface

2023-05-22
CURRENT
AS5725C
This SAE Aerospace Standard (AS) defines implementation requirements for the electrical interface between: a Aircraft carried miniature store carriage systems and miniature stores b Aircraft parent carriage and miniature stores c Surface-based launch systems and miniature stores The interface provides a common interfacing capability for the initialization and employment of smart miniature munitions and other miniature stores from the host systems. Physical, electrical, and logical (functional) aspects of the interface are addressed.
Standard

APU Gas Turbine Engine Test Cell Correlation

2023-05-19
CURRENT
ARP5435A
This paper describes a recommended practice and procedure for the correlation of test cells that are used for the performance testing of APU (auxiliary power unit) engines. Test cell correlation is performed to determine the effect of any given test cell enclosure and equipment on the performance of an engine relative to the baseline performance of that engine. The baseline performance is generally determined at the original equipment manufacturer (OEM) designated test facility. Although no original equipment manufacturer (OEM) documents are actually referenced, the experience and knowledge of several OEMs contributed to the development of this document. Each engine Manufacturer has their own practices relating to correlation and they will be used by those OEMs for the purpose of establishing certified test facilities.
Standard

Aerospace Military Aircraft Hydraulic System Characteristics

2023-04-26
CURRENT
AIR1899A
This SAE Aerospace Information Report (AIR) has been compiled to provide information on hydraulic systems fitted to the following categories of military vehicles. Attack Airplanes Fighter Airplanes Bombers Anti-Sub, Fixed Wing Airplanes Transport Airplanes Helicopters Boats
Standard

Synthetic Jet Fuels from Non-Petroleum Feed Stocks

2023-02-20
CURRENT
AIR6148
This SAE Aerospace Information Report (AIR) provides general information on the developing subject of synthetic jet fuels derived from non-petroleum feed stocks. It addresses synthetic jet fuel properties and other topics associated with their use and is intended as a guide to assist aviation fuel system designers in considering important information on fuel properties when designing aircraft fuel systems and components. The AIR is limited to “drop-in” fuels that meet the requirements of the respective fuel specifications and are compatible with typical aircraft and ground refueling systems. While some key properties are included in this AIR for discussion, the reader should utilize documents such as MIL-HDBK-510 or the ASTM International research reports for a more-detailed review of fuel properties. AIR7484 also gives more details on fuel properties, specifically as they relate to airframe fuel system design.
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