Airplane Flight Manual Supplement

G500 PFD/MFD System 190-01102-00 Rev. 5
Instructions for Continued Airworthiness Page 6 of 13
2.5 Periodic Maintenance Instructions
All G500 system LRUs are designed to detect internal failures. A thorough self-test is executed
automatically upon application of power to the units, and built-in tests are continuously executed.
Detected errors are indicated on the GDU 620 display via failure annunciations.
Operation of the G500 system is not permitted unless an inspection as described in this section has
been completed within the preceding 12 calendar months. Conduct a visual inspection (look for signs of
wear, deterioration, or damage to wires, switches, backshells, connectors, overbraid, bonding straps or
foil) of the G500 system LRUs and wiring harnesses to ensure installation integrity:
1. Inspect all units for security of attachment, including visual inspection of brackets and other
supporting structure attaching all units to the airframe.
2. Inspect all switches, knobs and buttons for legibility.
3. Visually inspect each unit’s wiring for chafing or wear at each termination.
4. Visually check for any signs of corrosion.
2.5.1 Transient Voltage Suppressors (non-metallic aircraft only)
The GDU 620 #1, GRS 77 #1, GDC 74( ) #1, and GAD 43 (if installed) will have a TVS located at each
LRU. The electronic Mid Continent Instrument standby Attitude Indicator (if installed) will have a TVS
located at the indicator and at the attitude indicator power bus. These components must be tested every
24 calendar months in accordance with section 8.3.1 of the G500 AML STC Installation Manual.
2.5.2 Aluminum Foil Tape (non-metallic aircraft only)
Any aluminum foil tape used in the G500 installation (see section 3.1 of this document) must be
inspected every 12 calendar months in accordance with section 8.3.2 of the G500 AML STC Installation
Manual.
2.5.3 GDU 620 – Display Unit
Maintenance of the GDU 620 is ‘on condition’ only.
2.5.4 GRS 77 – Attitude, Heading Reference System (AHRS)
The GRS 77 utilizes an Earth magnetic field model which is updated once every five years as part of the
Aviation Database maintained by the owner/operator. If the magnetic model is not up to date, the unit will
issue an alert upon startup indicating the model has expired. The model can be updated in accordance
with the database update section of the G500 AML STC Installation Manual.
Otherwise maintenance of the GRS 77 is ‘on condition’ only.
2.5.5 GMU 44 – Magnetometer
Maintenance of the GMU 44 is ‘on condition’ only.
2.5.6 GDC 74( ) – Air Data Computer
Test according to 14 CFR § 91.411. When testing in accordance with 14 CFR Part 43, Appendix E, it is
not necessary to perform sections (b)(1)(iv), Friction, or (b)(1)(vi), Barometric Scale Error.
2.5.7 GTP 59 – OAT Probe
Maintenance of the OAT Probe is ‘on condition’ only.
2.5.8 GAD 43/43e – Adapter
Maintenance of the GAD 43/43e is ‘on condition’ only.