Maintenance and Modifications
Duncan Adds Rockwell Collins Transponder Services
The agreement makes Duncan the only non-OEM facility approved for the update.

Rockwell Collins recently approved Duncan Aviation as an authorized service provider for repair, service and modification of its TDR-94 and TDR-94D transponders. The TDR-94D transponder is a solid-state, crystal-controlled receiver/transmitter designed for Tcas II-equipped business aircraft. The units can be upgraded to meet the upcoming ADS-B mandate for 2020.