Table of Contents
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1
GENERAL DESCRIPTION..............................................................................................................1-1
1.1 Introduction........................................................................................................................................1-1
1.2 Equipment Description ......................................................................................................................1-1
1.3 Interface Summary.............................................................................................................................1-2
1.4 Technical Specifications ....................................................................................................................1-2
1.5 Certification .......................................................................................................................................1-4
1.6 Reference Publications ......................................................................................................................1-6
1.7 Aviation Limited Warranty................................................................................................................1-7
2
INSTALLATION OVERVIEW ........................................................................................................2-1
2.1 Introduction........................................................................................................................................2-1
2.2 Installation Approval Considerations for Pressurized Aircraft..........................................................2-3
2.3 Wiring ................................................................................................................................................2-4
2.4 Cooling Air ........................................................................................................................................2-4
2.5 Aircraft Mounting Requirements for GRS 77/GMU 44 ....................................................................2-4
3
INSTALLATION PROCEDURE......................................................................................................3-1
3.1 Unpacking Unit..................................................................................................................................3-1
3.2 Electrical Connections .......................................................................................................................3-1
3.3 Backshell Assembly...........................................................................................................................3-2
3.4 GRS 77/GMU 44 Interconnect Harness Fabrication Instructions .....................................................3-3
3.5 GRS 77 and GMU 44 Mounting Instructions....................................................................................3-4
3.6 GRS 77 Rack to Unit Flatness Check ................................................................................................3-4
3.7 Post Installation Inspection................................................................................................................3-5
4
SYSTEM INTERCONNECTS..........................................................................................................4-1
4.1 Pin Function List................................................................................................................................4-1
4.2 Power Function ..................................................................................................................................4-3
4.3 Serial Data Electrical Characteristics.................................................................................................4-4
GRS 77/GMU 44 Installation Manual
190-00303-10
TABLE OF CONTENTS
PAGE
Page iii
Revision L
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Table of Contents
