Aviation Maintenance Terms beginning with T

TACAN (Tactical Air Navigation)

A radio navigation facility used by military aircraft for both direction and distance information. Civilian aircraft receive distance information from a TACAN on their DME.

TCAS

Traffic Alert Collision Avoidance System.

TIG welding

Tungsten inert welding is a form of electric arc welding in which the electrode is a nonconsumable tungsten wire. TIG welding is now called GTA (gas tungsten arc) welding.

TMC

Thrust management computer.

TR unit

A transformer-rectifier unit. A TR unit reduces the voltage of AC and changes it into DC.