Providing pilots with optimal Mode S transponder performance, the MST 67A offers all the capabilities needed to operate in the evolving world airspace. This lightweight transponder weighs just 8.5 lbs. and incorporates all the latest technology, including the Elementary and Enhanced Surveillance functionality and unsurpassed data link capability with full Level 3 compliance.

The MST 67A features a unique Flight ID function that converts the transponder’s Mode S address (for US registered aircraft only) into the tail number of the aircraft. For most Part 91 operators, this is also your Flight ID, so it’s automatically stored in the transponder register, eliminating the need to install and use an additional control head or FMS. This makes compliance with Elementary Surveillance simple and convenient.

The solid-state MST 67A also has a flexible architecture designed with future growth in mind. Fully TSO’d, this transponder utilizes a 2 MCU ARINC form-factor and is equipped with standard ARINC 400-series connectors for easy installation.




  • 2.25″W x 7.63″H x 15.0″L

Receiver Frequency

  • 1030 MHz +- 0.2 MHz


  • 8.5 lbs.

Temperature Range

  • -55C to +70C

Transmitter Frequency

  • 1090 MHz +-1 MHz

Power Requirements

  • 28VDC @ 2 amp max. 

TSO Compliance

  • TSO C112, RTCA DO-160B, RTCA DO-178A Level 2 Software 

Form Factor

  • 4 MCU per ARINC 600

Connector Type

  • ARINC 404A


  • ARINC 718

Transmitter Power

  • 400 Watts (nominal)

Transmit Reply Rate Capability

  • Rate limits of replies: ATCRBS 750 PRF, Mode S 50 PRF

Input VSWR

  • 1.5:1

Altitude Inputs

  • Dual ARINC 575 Air Data (ARINC 419), Dual ARINC 706 Air Data (ARINC 4219), Dual Gillham (Mode C Gray Code)

Control Inputs

  • Dual ARINC 718 (ARINC 429)

Maintenance Inputs

  • Per ARINC 604 (ARINC 429)

Datalink I/O

  • Per ARINC 718 (ARINC 429)

Flight ID Input

  • Per ARINC 718 (ARINC 429)


  • Per ARINC 735 (HI-SPEED 429)


  • Transmitted at 1 +- 0.2 sec. random, full self verification of every squitter’s data and occurrence