Aviation Electrician CDQAR Practice Test 2026 – The All-in-One Guide to Exam Success!

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Which items are included in TMDE?

Devices and aviation SE used to measure, calibrate, gauge, test, inspect, diagnose, or examine materials, supplies, and equipment to determine compliance with specifications, engineering drawings, technical orders, technical manuals, maintenance instructions, and/or serviceability standards.

All aircraft avionics software.

TMDE stands for Test, Measurement, and Diagnostic Equipment. It covers the tools, devices, and software that are used to measure, calibrate, test, inspect, diagnose, or examine aircraft, materials, and equipment so you can verify they meet specifications, drawings, manuals, and serviceability standards. Avionics software fits this role because it provides the testing and diagnostic capabilities needed to assess avionics systems—running diagnostic routines, calibrating subsystems, simulating conditions, and collecting measurements. In maintenance, software isn’t just for operation; it directly enables measurement and diagnosis, which is why software that supports testing and diagnosing avionics is considered part of TMDE. The other options aren’t TMDE: chemical test kits are just a specific type of test tool, flight crew training manuals are instructional materials, and the broader description in the first choice describes TMDE in general rather than identifying the items themselves.

Only chemical test kits.

Flight crew training manuals.