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Garmin GNC 355 Maintenance Manual
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190-02207-A2
March
2023
Revision 3
GPS 175/GNX 375/GNC 355
Part 23 AML STC
Maintenance Manual
with Instructions for Continued Airworthines
s
for STC SA02636SE
Aircraft make, model, registration n
umber, and serial number, along
with the applicable STC configuration inform
ation, must be
completed in Appendix A and saved with aircraft permanent records.
2
Table of Contents
Table of Contents
9
Content, Scope, and Purpose
14
Organization
14
Applicability
15
Publications
15
Revision and Distribution
15
Table 1-1 Reference Documentation
15
Reference
16
2 System Description
17
Equipment Descriptions
18
Figure 2-1 GPS 175 System Diagram
18
Figure 2-2 GNX 375 System Diagram
19
Gnx 375
19
Gps 175
19
Figure 2-3 GNC 355 System Diagram
20
Gnc 355
20
Figure 2-4 Flight Stream 510
21
Flight Stream 510
21
Gae 12
21
3 Control and Operation
22
Gnx 375
22
Gps 175
22
Figure 3-1 GPS 175 Home Page
23
Figure 3-2 GNX 375 Home Page
24
Figure 3-3 GNC 355 Home Page
25
Gnc 355
25
Configuration Mode Overview
26
Figure 3-4 Configuration Mode Home Page
26
System Information
26
Updates
26
Figure 3-5 Setup Page
27
Setup
27
Diagnostics
29
Feature Enablement
31
SD Save
31
SD Load
32
4 Instructions for Continued Airworthiness
33
Periodic Maintenance
35
Servicing Information
35
Special Tools
35
Maintenance Intervals
36
Table 4-1 Periodic Maintenance
36
Visual Inspection
37
Electrical Bonding Test
38
GPS 175/GNX 375/GNC 355 Bonding Check (Composite Aircraft)
38
GPS 175/GNX 375/GNC 355 Bonding Check (Metallic or Tube-And-Fabric Aircraft)
38
Additional Instructions
39
Overhaul Period
39
5 Troubleshooting
40
General Troubleshooting
41
Table 5-1 GPS 175 General Troubleshooting Guide
41
Table 5-2 GNX 375 General Troubleshooting Guide
42
Table 5-3 GNC 355 General Troubleshooting Guide
43
Failure Annunciations
45
Figure 5-1 Failure Screen
45
Figure 5-2 GPS 175/GNX 375/GNC 355 System Alert Troubleshooting
46
Figure 5-3 GPS 175/GNC 355 External Transponder Alert Troubleshooting
48
Figure 5-4 GPS 175/GNC 355 Traffic Alert Troubleshooting
49
Figure 5-5 GNX 375 Traffic Alert Troubleshooting
50
Figure 5-6 XPDR Alert Troubleshooting
55
Figure 5-7 GNC 355 COM Alert Troubleshooting
56
Figure 5-8 Database Alert Troubleshooting
57
Figure 5-9 GPS/WAAS Alert Troubleshooting
59
Figure 5-10 Import Alert Troubleshooting
60
Figure 5-11 Miscellaneous Alert Troubleshooting
61
Figure 5-12 J1751 Connector (Looking at Unit)
62
GPS 175 Connector Pinout Information
62
J1751 62-Pin HD-Dsub
62
Table 5-4 J1751 Connector Pinout
63
Figure 5-13 J3751 Connector (Looking at Unit)
64
GNX 375 Connector Pinout Information
64
J3751 62-Pin HD-Dsub
64
Table 5-5 J3751 Connector Pinout
65
Figure 5-14 J3752 Connector (Looking at Unit)
66
J3752 44-Pin HD-Dsub
66
Table 5-6 J3752 Connector Pinout
66
Figure 5-15 J3551 Connector (Looking at Unit)
67
GNC 355 Connector Pinout Information
67
J3551 62-Pin HD-Dsub
67
Table 5-7 J3551 Connector Pinout
68
Figure 5-16 J3552 Connector (Looking at Unit)
69
J3552 44-Pin HD-Dsub
69
Table 5-8 J3552 Connector Pinout
69
6 Equipment Removal and Re-Installation
70
Gps 175
71
GPS 175 Re-Installation
71
GPS 175 Removal
71
Figure 6-1 GPS 175 Rack Installation
72
Gnx 375
73
GNX 375 Re-Installation
73
GNX 375 Removal
73
Figure 6-2 GNX 375 Rack Installation
74
Gnc 355
75
GNC 355 Re-Installation
75
GNC 355 Removal
75
Figure 6-3 GNC 355 Rack Installation
76
Display of Self-Test Data
77
Table 6-1 Instrument Test Data
77
Configuration Module Replacement
78
Figure 6-4 Configuration Module Assembly
78
Data Card/Flight Stream 510
79
Data Card/Flight Stream 510 Re-Installation
79
Data Card/Flight Stream 510 Removal
79
Figure 6-5 GAE Assembly
79
Gae 12
79
GAE 12 Re-Installation
79
GAE 12 Removal
79
Bonding Strap
80
Bonding Strap Removal
80
Bonding Strap Replacement
80
Software
81
Software Check
82
Software Updates
82
System Configuration and Checkout
83
GPS 175/GNX 375/GNC 355 Configuration
84
Overview
84
Regulatory Test (GNX 375)
84
System Checkout
84
ADS-B out Test (GNX 375)
85
Other manuals for Garmin GNC 355
Pilot's Guide
290 pages
Service Bulletin
10 pages
5
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Garmin GNC 355 Specifications
General
Channels
200
Interface
RS-232
GPS Receiver
WAAS
Connectivity
Bluetooth
Display Type
Color
Approaches
LPV/LNAV/VNAV/GPS
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