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Advisory Circular (AC) 25-11B

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Advisory Circular (AC) 25-11B 0 U.S. Department of Transportation Advisor Federal Aviation Administration Circular Subject: Electronic Flight Displays Date: I 0/07/14 AC No: 25-118 Initiated By: ANM-111 This advisory circular (AC) provides guidance for showing compliance with certain requirements of Title 14, Code of Federal Regulations part 25 for the design, installation, integration, and approval of electronic flight deck displays, components, and systems installed in transport category airplanes. Revision B adds appendices F and G to the original AC and updates references to related rules and documents. If you have suggestions for improving this AC, you may use the Advisory Circular Feedback form at the end of this AC. Jeffrey E. Duven Manager, Transport Airplane Directorate Aircraft Certification Service 10/07/14 AC 25-11B CONTENTS Paragraph Page Chapter 1. Introduction ................................................................................................................ 1-1 1.1 Purpose. ......................................................................................................................... 1-1 1.2 Applicability. ................................................................................................................ 1-1 1.3 Cancelation. .................................................................................................................. 1-1 1.4 General. ......................................................................................................................... 1-1 1.5 Definitions of Terms Used in this AC. ......................................................................... 1-4 1.6 Background. .................................................................................................................. 1-4 Chapter 2. Electronic Display System Overview ........................................................................ 2-1 2.1 General. ......................................................................................................................... 2-1 2.2 Design Philosophy. ....................................................................................................... 2-1 2.3 Human Performance Considerations. ........................................................................... 2-2 2.4 Addressing Intended Function in the Certification Plan. .............................................. 2-2 2.5 Non-Interference with Flying Duties. ........................................................................... 2-2 Chapter 3. Electronic Display Hardware ..................................................................................... 3-1 3.1 Display Hardware Characteristics. ................................................................................ 3-1 3.2 Visual Display Characteristics. ..................................................................................... 3-1 3.3 Installation..................................................................................................................... 3-4 3.4 Power Bus Transient. .................................................................................................... 3-6 Chapter 4. Safety Aspects of Electronic Display Systems .......................................................... 4-1 4.1 General. ......................................................................................................................... 4-1 4.2 Identification of Failure Conditions. ............................................................................. 4-1 4.3 Effects of Display Failure Conditions........................................................................... 4-2 4.4 Mitigation of Failure Conditions. ................................................................................. 4-3 4.5 Validation of the Classification of Failure Conditions and Their Effects. ................... 4-4 4.6 System Safety Guidelines. ............................................................................................ 4-4 4.7 System Safety Assessment Guidelines. ........................................................................ 4-6 Chapter 5. Electronic Display Information Elements and Features ............................................. 5-1 5.1 Display Information Elements and Features. ................................................................ 5-1 ii 10/07/14 AC 25-11B CONTENTS (CONTINUED) Paragraph Page 5.2 General. ......................................................................................................................... 5-1 5.3 Consistency. .................................................................................................................. 5-2 5.4 Display Information Elements. ..................................................................................... 5-3 5.5 Labels. ........................................................................................................................... 5-3 5.6 Symbols......................................................................................................................... 5-5 5.7 Indications. .................................................................................................................... 5-6 5.8 Color Coding. ................................................................................................................ 5-7 5.9 Dynamic (Graphic) Information Elements on a Display. ........................................... 5-11 5.10 Sharing Information on a Display. .............................................................................. 5-12 5.11 Annunciations and Indications. ................................................................................... 5-13 Chapter 6. Organizing Electronic Display Information Elements ............................................... 6-1 6.1 Organizing Information Elements................................................................................. 6-1 6.2 Types and Arrangement of Display Information. ......................................................... 6-1 6.3 Managing Display Information. .................................................................................... 6-5 6.4 Managing Display Configuration. ................................................................................ 6-8 6.5 Methods of Reconfiguration. ...................................................................................... 6-10 Chapter 7. Electronic Display System Control Devices .............................................................. 7-1 7.1 General. ......................................................................................................................... 7-1 7.2 Multi-Function Control Labels. .................................................................................... 7-1 7.3 Multi-Function Controls. .............................................................................................. 7-1 7.4 Cursor Control Devices................................................................................................. 7-3 7.5 Cursor Displays. ............................................................................................................ 7-4 Chapter 8. Showing Compliance for Approval of Electronic Display Systems .......................... 8-1 8.1 General Compliance Considerations (Test and Compliance). ...................................... 8-1 8.2 Means of Compliance. .................................................................................................. 8-1 Chapter 9. Continued Airworthiness and Maintenance ............................................................... 9-1 9.1 Continued Airworthiness and Maintenance. ................................................................. 9-1 9.2 General. ......................................................................................................................... 9-1 iii 10/07/14 AC 25-11B CONTENTS (CONTINUED) Paragraph Page 9.3 Design for Maintainability. ........................................................................................... 9-1 9.4 Maintenance of Display Characteristics. ...................................................................... 9-2 Appendix A. Primary Flight Information ................................................................................... A-1 A.1 General. ........................................................................................................................ A-1 A.2 Attitude. ....................................................................................................................... A-1 A.3 Continued Function of Primary Flight Information (Including Standby) in Conditions of Unusual Attitudes or in Rapid Maneuvers. ........................................... A-1 A.4 Airspeed and Altitude. ................................................................................................. A-2 A.5 Low- and High-Airspeed Awareness Cues. ................................................................. A-3 A.6 Vertical Speed. ............................................................................................................. A-5 A.7 Flight Path Vector or Symbol. ..................................................................................... A-5 Appendix B. Powerplant Displays ...............................................................................................B-1 B.1 General. .........................................................................................................................B-1 B.2 Design Guidelines.
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