Servicing Information; Periodic Maintenance Instructions; Special Tools - Garmin GI 275 Maintenance Manual

3.2 Servicing Information

There are no servicing requirements for the GI 275 system. In the event of a system or LRU failure,
troubleshoot the GI 275 system in accordance with Section 4.
3.2.1

Periodic Maintenance Instructions

The GI 275 system is designed to detect internal failures. A thorough self-test is executed automatically
upon application of power to the unit, and built-in tests are continuously executed while the LRUs are
operating. Detected errors are indicated on the GI 275 display via failure annunciations, system messages,
or a combination of the two. A list of reported errors for the system can be printed in the form of a
maintenance log using the instructions provided in Section 4.1.
3.2.2

Special Tools

A milliohm meter with an accuracy of ±0.1 mΩ (or better) is required to measure the electrical bonding
between the GI 275 system components and rotorcraft ground.
A pitot-static ground tester is required for internal ADAHRS and standby instrument checkout procedures
and maintenance.
190-02246-C2
Rev. 3
GI 275 Part 27 AML STC Maintenance Manual
Page 3-3