Instruction Manual

Instructions for Continued Airworthiness 190-00792-12 Rev 1
for the Garmin G500H Installation in Eurocopter AS350 Page 16 of 80
GDC 74H ADC
7. Access GDC 74H, (Reference Section 6-00-00 Dimensions and Access) and disconnect all
harness connectors.
8. Measure the resistance between the GDC 74H and a nearby exposed portion of aircraft
metallic structure. Verify that the resistance is less than or equal to 20 milliohms. If greater
must be restored to the value specified in the G500H STC Installation Manual.
9. Reconnect all disconnected harness connectors and ensure they are secure
GMU 44
10. Access GMU 44, (Reference Section 6-00-00 Dimensions and Access) and disconnect all
harness connectors.
11. Measure the resistance between the GMU 44 and a nearby exposed portion of aircraft
metallic structure. Verify that the resistance is less than or equal to 20 milliohms. If greater
must be restored to the value specified in the G500H STC Installation Manual.
12. Reconnect all disconnected harness connectors and ensure they are secure
GTP 59
13. Access GTP 59, (Reference Section 6-00-00 Dimensions and Access) and disconnect all
harness connectors.
14. Measure the resistance between the GTP 59 and a nearby exposed portion of aircraft
metallic structure. Verify that the resistance is less than or equal to 5 milliohms. If greater
must be restored to the value specified in the G500H STC Installation Manual.
15. Reconnect all disconnected harness connectors and ensure they are secure
4. Post Inspection Maintenance Practices
After completion of the 1 Year (Annual) Inspection, 5 Year Inspection and 10 Year/2000 Flight
Hour Inspection and all discrepancies found have been corrected, the Return-to-Service
Practices (Reference Section 12-00-00 Return-to-Service Practices) should be accomplished in
preparation for returning the rotorcraft to service
05-20-10