190-02246-11
GI 275 Part 23 AML STC Maintenance Manual
Rev. 1
Page 3-3
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
GI 275 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 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 aircraft ground.
A pitot-static ground tester is required for internal ADAHRS and standby instrument checkout procedures
and maintenance.
