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Standard

Guidelines for Time-Limited-Dispatch (TLD) Analysis for Electronic Engine Control Systems

2018-09-04
CURRENT
ARP5107C
This SAE Aerospace Recommended Practice (ARP) provides methodologies and approaches which have been used for conducting and documenting the analyses associated with the application of Time Limited Dispatch (TLD) to the thrust control reliability of Full Authority Digital Engine Control (FADEC) systems. The TLD concept is one wherein a fault-tolerant system is allowed to operate for a predetermined length of time with faults present in the redundant elements of the system, before repairs are required. This document includes the background of the development of TLD, the structure of TLD that was developed and implemented on present generation commercial transports, and the analysis methods used to validate the application of TLD on present day FADEC equipped aircraft.
Standard

Process Control Methods

2018-09-02
CURRENT
AS13006
This standard establishes requirements for Process Control Methods to sustain product conformity. This includes training, selection of control methods, analysis and improvement of their effectiveness, and subsequent monitoring and control. It applies to all controls documented in the Control Plan. This will include but is not limited to Key Characteristics (KCs) and Critical Items (CIs). This standard aligns and collaborates with the requirements of AS9100, AS9103, AS9145, AS13000, AS13002, AS13003, and AS13004. Commercial-Off-The-Shelf (COTS) items and Standard Catalogue Items (that neither the customer nor supplier hold design authority for) are not included.
Standard

Guide for Achieving Plating/Finishing Compatibility with Connectors and Accessories used in Electrical Wiring Interconnect Systems (EWIS)

2018-08-29
CURRENT
ARP6903A
The intent of this ARP is to provide guidance to assist users in choosing compatible component finishes/platings to achieve the best corrosion resistance performance for compatible components/couples. This SAE Recommended Practice is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances. A galvanic compatibility table is provided to assist with the compatible plating/finish selection. Specific plating performance parameters for each individual plating and each connector/accessory specification have also been provided to assist the product user with compatible plating/finish selection.
Standard

Metal Clad Fibers for Electrical Shielding and Harness Overbraid

2018-08-23
CURRENT
AIR5464A
Over the past two and one-half decades several metal clad fibers and fabrics have been developed to provide aerospace vehicle designers with a conductive, lighter weight alternative to coated copper, coated stainless steel and steel wire used for cable and wire shielding and harness overbraids on electrical cables. Several of these candidates have been unable to provide the strength or thermal stability necessary for the aerospace environment. However, several polymer-based products have shown remarkable resistance to the rigorous environment of aerospace vehicles. Concurrent with these fiber developments, there have been changes in the structures of aerospace vehicles involving greater use of nonmetallic outer surfaces. This has resulted in a need for increased shielding of electrical cables which adds substantial weight to the vehicle. Thus, a lighter weight shielding material has become more critical to meet the performance requirements of the vehicle.
Standard

Aircraft Seat Design Guidance and Clarifications

2018-08-23
CURRENT
ARP5526E
This SAE Aerospace Recommended Practice (ARP) documents a common understanding of terms, compliance issues, and design criteria to facilitate certification of seat installations specific to Part 25 aircraft. This ARP provides general guidance for seats to be installed in Part 23 aircraft and Parts 27 and 29 rotorcraft and does not specify specific designs or design methods for such certification.
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