Trig TT21 Transponder Mode Small Class 2 TSO

The Trig TT21 is a compact Class 2 Mode S Level 2els transponder system for certified avionics installations. Manufacturer part number: 00710-00.

The system uses a separately mounted TC20 control head, helping to minimise instrument-panel space. The TT21 supports Mode S operation and 1090ES ADS-B Out capability when installed as part of an appropriate compliant aircraft system.

• Class 2 Mode S Level 2els transponder
• 1090ES ADS-B Out capable
• Nominal transmitter output: 130 W at the connector
• DC supply range: 9–33 V
• Published certification: ETSO C88A, C112C and C166A; FAA TSO-C88b, TSO-C112c and TSO-C166b
• Compact published dimensions: controller 44 × 63 × 54 mm; transponder in tray 48 × 68 × 160 mm

Trig lists the TT21 as no longer manufactured. Confirm the scope of supplied equipment and ensure installation, configuration and continued-airworthiness requirements are assessed against the applicable aircraft documentation and current regulatory requirements.

Relevant manufacturer documentation: TT21/TT22 installation and operating manuals and Trig compact transponder product information.