0 U.S. Department of Transportation Federal Aviation

Administration

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. DuvenManager, Transport Airplane Directorate Aircraft Certification Service

AdvisorCircular

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 I ntended 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 I nformation 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 I nformation. ......................................................... 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