Airplane Flight Manual Supplement

G500 PFD/MFD System 190-01102-00 Rev. 5
Instructions for Continued Airworthiness Page 8 of 13
2.5.10 Electrical Bonding Test
G500 LRU electrical bonding must be tested every 2000 flight hours or ten (10) years, whichever is first.
During the test, any cables normally attached to the LRU must be disconnected from the LRU. If
measured resistance is greater than applicable values in the following table, bonding must be improved
to meet applicable requirements for a new installation in accordance with section 3.8 of the G500 AML
STC Installation Manual.
LRU
Metallic Aircraft
Non-Metallic Aircraft
GDU 620 – Display Unit
40 mΩ (to instrument panel)
40 mΩ (to instrument panel)
GRS 77 – Attitude, Heading
Reference System (AHRS)
20 mΩ (to aircraft ground
plane)
20 mΩ (to instrument panel)
GMU 44 – Magnetometer
20 mΩ (to aircraft ground
plane)
No bond check required since
the GMU is required to be
isolated from it’s mounting
location. Verify that there is
sufficient clearance around the
installation per section 2.5.11.5.3
of the G500 AML STC
Installation Manual
GDC 74( ) – Air Data Computer
20 mΩ (to aircraft ground
plane)
20 mΩ (to instrument panel)
GTP 59 – OAT Probe
5 mΩ (to aircraft skin)
No bond check required since
the GTP is required to be
isolated from it’s mounting
location. Verify that there is
sufficient clearance around the
installation per section 2.5.11.7.2
of the G500 AML STC
Installation Manual
GAD 43/43e – Adapter
20 mΩ (to aircraft ground
plane)
20 mΩ (to instrument panel)
Note: there are no applicable bonding requirements for the Mid Continent Instruments Attitude Indicator
Models 4300-4( ), or 4200-( ) with MD420
2.6 Troubleshooting Information
If error indications are displayed on the GDU 620 display unit, and/or the optional Mid Continent
Instruments standby attitude indicator, consult the Troubleshooting section contained in the G500 AML
STC Installation Manual. The ‘G500 System Post-Installation Checkout Log’ in the aircraft permanent
records includes the configuration information for the installation. (See Section 5 in the G500 System
Installation Manual for a sample Log).
2.7 Removal and Replacement Information
If any G500 LRUs are removed and reinstalled, verify that the LRU unit power-up self-test sequence is
successfully completed and no failure messages are annunciated on the GDU 620 display. See the unit
replacement procedure in Section 3 of the G500 AML STC Installation Manual. Perform any additional
procedures that are required for each LRU, as specified in the following subsections.