The TC20 panel mounted control head controls a remotely mounted TT21 or TT22 Mode S transponder. It mounts into the panel using a 57 mm (2-1/4 inch) round hole or smaller compact mount. The unit displays the operation mode of the transponder, reported pressure altitude, current squawk code, and flight ID.This TC20 control head (EDMO# 01318-00) includes the control head, installation kit, user manuals, and EASA form 1.
