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Electronic Engine Control Specifications and Standards

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • AIR4250C
  • Current
Published 2018-12-05 by SAE International in United States

This report lists documents that aid and govern the design, development, certification, and utilization of aerospace electronic engine control systems. The report lists the military and industry specifications and standards that are commonly used in electronic engine control system design. Also included are Airworthiness Authority documents and requirements associated with certification. However, these lists are not necessarily complete.

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

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP5107C
  • Current
Published 2018-09-04 by SAE International in United States
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. Although this document is specific to TLD analyses (for FADEC systems) of the loss of thrust control, the techniques and processes discussed in this document are considered applicable to other FADEC system failure effects or other systems, such as: thrust reverser, and propeller control systems, and overspeed protection systems.
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Guidelines for Preparing Reliability Assessment Plans for Electronic Engine Controls

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP5890B
  • Current
Published 2018-05-07 by SAE International in United States
This document establishes guidelines for a Reliability Assessment Plan (herein also called the Plan), in which Electronic Engine Control manufacturers document their controlled, repeatable processes for assessing reliability of their products. Each Electronic Engine Control manufacturer (the Plan owner) prepares a Plan, which is unique to the Plan owner. This document describes processes that are intended for use in assessing the reliability of Electronic Engine Controls, or subassemblies thereof. The results of such assessments are intended for use as inputs to safety analyses, certification analyses, equipment design decisions, system architecture selection and business decisions such as warranties or maintenance cost guarantees. This Guide may be used to prepare plans for reliability assessment of electronic engine controls in which, typically, the impact of failure is high, the operating environment can be relatively severe and the opportunity to improve the equipment after the start of production is limited. In this and similar industries, accurate estimates of expected equipment reliability are necessary prior to the start of production. This guide was initially produced in response to the recognized…
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Guidelines for Engine Component Tests

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP5757A
  • Current
Published 2016-10-16 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) provides guidance for substantiating the airworthiness of aircraft engine components. Generally these components are associated with the engine control system, the system or systems that allow the engine to provide thrust or power as demanded by the pilot of the aircraft while also ensuring the engine operates within acceptable operating limits. But these components may also include hardware and systems associated with engine lubrication, engine or aircraft hydraulic or electrical systems, aircraft environmental control systems, thrust reverser control, or similar aircraft or engine propulsion system functions. This paper develops the concept of using a 26 item matrix of environmental conditions for evaluating aircraft engine component airworthiness. This approach is compatible with current practices used in the industry and has been accepted by engine certification authorities as part of engine certification programs.
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Electronic Engine Control Hardware Change Management

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP6109
  • Current
Published 2014-02-21 by SAE International in United States
This document is intended for use by manufacturers of aircraft, engines and Electronic Engine Controls [EECs] as a component change process and evaluation guideline. Its purpose is to provide an effective means of managing the modification of electronic hardware. The process defined in this document is based upon: an understanding of the electronic component market evolution, e.g., obsolescence; lessons learned from the effects caused by the introduction of electrical component changes in a service fleet environment; industry best practice; and an understanding of the applicable regulations.
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Electronic Propulsion Control/Aircraft Interface Control Documents

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP4874A
  • Current
Published 2013-08-29 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) provides guidelines for the format and content of documents defining the interface between electronic propulsion control systems and aircraft systems. The scope includes civilian aircraft powered by turbofan, turboprop, and turboshaft engines equipped with electronic engine controls.

Guidelines for the Integration of Electronic Engine Control Systems for Transport Category (Part 25) and General Aviation (Part 23) Aircraft

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • AIR5924A
  • Current
Published 2013-01-16 by SAE International in United States
This SAE Aerospace Information Report (AIR) provides methodologies and approaches that have been used to install and integrate full-authority-digital-engine-control (FADEC) systems on transport category aircraft. Although most of the information provided is based on turbofan engines installed on large commercial transports, many of the issues raised are equally applicable to corporate, general aviation, regional and commuter aircraft, and to military installations, particularly when commercial aircraft are employed by military users. The word “engine” is used to designate the aircraft propulsion system. The engine station designations used in this report are shown in Figure 1. Most of the material concerns an Electronic Engine Control (EEC) with its associated software, and its functional integration with the aircraft. However, the report also addresses the physical environment associated with the EEC and its associated wiring and sensors. Since most of today’s transport category engines use dual-channel full-authority digital engine control (FADEC) systems, this is the configuration which is addressed. A typical FADEC system configuration is shown in Figure 2.
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External Software Loading of Electronic Engine Controls

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • ARP4714A
  • Current
Published 2012-09-25 by SAE International in United States
This paper presents guidelines for development of a procedure for external software loading of an electronic engine control (EEC) for a commercial application, on-wing or in a qualified service shop. This paper makes the following assumptions: a The EEC is designed to accept external software loading. b The EEC is certified as part of an engine. c The support equipment is qualified in accordance with procedures set forth by the engine (and aircraft, if necessary) certifying authority if the EEC cannot detect an integrity violation of the loaded program. d The software to be loaded has been approved by the engine and aircraft certifying authorities. e One or more configurations of EEC hardware has been identified for each version of software which is to be loaded in the EEC. It is appropriate to use these guidelines in the initial development phase, although the certification issues would not be applicable. Approval as used herein means approval by the engine (and aircraft, if necessary) certifying authority. There are cases where the engine may commence certification activities and…
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Electronic Engine Control Specifications and Standards

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • AIR4250B
  • Historical
Published 2012-01-18 by SAE International in United States
This report lists documents that aid and govern the design, development, certification and utilization of aerospace electronic engine control systems. The report lists the military and industry specifications and standards that are commonly used in electronic engine control system design. Also included are Airworthiness Authority documents and requirements associated with certification. However, these lists are not necessarily complete. The specifications and standards section has been divided into two parts; a master list arranged numerically and a categorized list that provides a functional breakdown and cross-reference of these documents. For specifications and standards, the issue available during the latest revision to this document is listed. Details of current revisions for many documents are available in the Department of Defense Index of Specifications and Standards (DODISS). It should be noted that not all of these documents are referenced or even recognized by all certification authorities. In addition, not all revisions of these documents are recognized by all authorities. The user should confirm before assuming that a document, or its process, will be accepted for approval. Additionally the…
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Electronic Engine Control Design Guide for Electromagnetic Environmental Effects

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • AIR5060A
  • Current
Published 2011-08-11 by SAE International in United States
The purpose of this document is to provide reference material for establishing compatibility of electronic gas turbine engine control systems and associated components with the electromagnetic environment and achieving compliance with associated airworthiness requirements.
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