ARINC 705-5 : 1985

1.0 INTRODUCTION AND DESCRIPTION
1.1 Purpose of This Characteristic
1.2 Functions and Modes of Opera
1.3 Reliability
1.4 Unit Description
1.5 Interchangeability
1.6 Regulatory Approval
2.0 INTERCHANGEABILITY STANDARDS
2.1 Form Factors, Connectors, and Index Pin Coding
2.2 Input and Output Signal Characteristics
2.3 Standard Interwiring
2.4 Power Circuitry
2.5 Weights
2.6 Thermal Interface and Design
2.7 Environmental Test Categories
2.8 Attitude and Heading Reference Unit (AHRU)
    Mounting
2.9 Airplane Dynamic Environment
3.0 SYSTEM DESIGN CONSIDERATIONS
3.1 General
3.2 Modes of System Operation
3.3 Outputs
3.4 Integrity Monitoring and Failure Warning
3.5 Built In Test Equipment (BITE)
3.6 Accuracy
3.7 AHRS Ground Speed (Customer Option)
4.0 STANDARD SIGNAL CHARACTERISTICS
4.1 General Accuracy and Operating Ranges
5.0 ATTITUDE AND HEADING REFERENCE UNIT DESIGN
5.1 General
5.2 Mounting Rigidity
5.3 Vibration Isolators
5.4 Attitude and Heading Reference Unit Functions
6.0 MAGNETIC SENSOR UNIT (MSU) DESIGN
7.0 PROVISIONS FOR AUTOMATIC TEST EQUIPMENT
7.1 General
7.2 Unit Identification
    ATTACHMENTS
0 AHRS Data Usage
1 Notes Applicable to Standard Interwiring
2 ARINC 705 AHRS Standard Interwiring
3 Middle Insert Pin Usage
4 ARINC 705 AHRU Connector Layout
5-1 Attitude Heading Reference Unit (AHRU)
    Dimensions and Tolerances
5-2 AHRU Mounting Tray General Layout
5-3 AHRU Mounting Tray Dimensions
6 Compass Control Panel Logic
7 Magnetic Sensor Unit
8 Environmental Test Categories
7 Magnetic Sensor Unit
8 Environmental Test Categories
9 Digital Control Word Format
10 AHRS Digital Data Summary
Notes To Attachment 10
11 AHRS Output Data Performance
12 (Sheet 1) Remote Magnetic Compensator Unit
12 (Sheet 2) RMCU Typical Design
12 (Sheet 3) RMCU Typical Design
13 Typical Control Panel
APPENDICES
1 Bibliography of the AEEC ARINC 705 AHRS
   Project
2 Non-Standard Applications

Specifies the basic requirements for an AHRS specifically designed for installation in commercial transport aircraft.