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Standard

Standard for Interfacing Resilient GNSS Receivers

2019-04-18
WIP
SAE1014
This standard defines how a resilient GNSS receiver provides enough information for an alternative PNT source to be selected when the GNSS receiver does not meet the required levels of accuracy, availability, integrity, or continuity even when the GNSS signals are subject to interference
Standard

Function-Based API for Gas Turbine Engine Performance Programs

2019-04-18
WIP
ARP4868D

The SAE Aerospace Standard document AS681 is the parent document of this SAE Aerospace Recommended Practice (ARP). AS681 applies to Engine programs written to conform to this document. This ARP specifies a set of functions and their expected behaviors that constitute a function based Application Program Interface (API) for gas turbine engine customer programs. The functions specified in this API are delivered by the Supplier as part of the Engine model.

This document defines generic language independent functions and specific appendices for implementations in C and Fortran.

The function based API specified in this ARP represents an alternative to the Fortran COMMON block structure, as specified in AS4191, historically used to communicate with an engine program. The customer may request emulation of the AS4191 interface if desired.

Standard

Nitrogen Absorption/Desorption (Gas Dissolution) in Aircraft Shock Absorbers

2019-04-18
WIP
AIR6942
This document outlines the current state of the art in the understanding of gas in solution in shock absorber oils in unseperated shock absorbers. A literature review, overview of Henry's law, Henry's law coefficients for known gas and oil couples, in-service operational problems, lessons learned, and potential future work will be discussed in the document.
Standard

Component Traceability Requirements for Life Limited Parts

2019-04-18
WIP
ARP6943
This document contains the recommended practices for the traceability of civil aircraft life limited parts. A unified means of tracking flight cycles, flight hours, and calendar time is provided which will ease the interchange of parts between companies and through the component's life cycle. A harmonized means of providing 'back to birth traceability' is provided.
Standard

Landing Gear Based Weight and Balance Systems

2019-04-18
WIP
AIR6941
This document outlines historical systems which have used the landing gear as a sensor or installation point for full aircraft weight and balance systems. A number of systems have been developed, installed, certified, and placed in service but few systems remain in regular use. The document will capture the history of these systems, reasons (where known) for their withdrawal from service, and lessons learned.
Standard

SAE 17.6 Cubic Inch Spark Plug Rating Engine

2019-04-18
WIP
J2203
This SAE Standard defines the standard engine to be used in determining spark plug preignition ratings. The engine is known as the SAE 17.6 Cubic Inch Spark Plug Rating Engine.
Standard

Mechanical Control Design Guide

2019-04-17
WIP
ARP5770A
This SAE Aerospace Recommended Practice (ARP) provides guidelines for the configuration and design of mechanical control signal transmission systems and subsystems. It is focused on the recommended practices for designing cable and pulley, pushrod and bellcrank and push-pull flexible cable control systems. These systems are typically used in some combination to transmit pilot commands into primary, secondary and utility control system commands (mechanical or electrical) or aircraft surface commands. On mechanically controlled aircraft, most pilot control commands are initiated through cockpit mounted wheels, sticks, levers, pedals or cranks that are coupled by pushrods or links to cable systems. The cable systems are routed throughout the aircraft and terminated in close proximity to the commanded surface or function where cranks and pushrods are again used to control the commanded function.
Standard

Driver Drowsiness and Fatigue in the Safe Operation of Vehicles – Definition of Terms and Concepts

2019-04-17
WIP
J3198
This Information Report provides definitions and discussions of key terms concerning driver drowsiness and fatigue, and basic information on measuring drowsiness and fatigue. It also includes information and concepts for driver drowsiness as they relate to safe operation of a vehicle. Examples of driver drowsiness and fatigue causal factors include those related to the following: (1) sleep quality and quantity, (2) time of day, (3) time on task (related to the task of driving), (4) task-related fatigue (arousal levels related to task underload and overload), and (5) combinations of these factors. Medical conditions, medication, alcohol or drugs exacerbate drowsiness; however, the discussion in this report is limited to fatigue concepts. The Information Report has two primary sections: Section I provides definitions and discussions of key terms concerning driver drowsiness and fatigue; Section II provides basic information on measuring drowsiness and fatigue.
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