• Form factor compatible retrofit for your existing BendixKing MST 67A Transponder
  • Certified for most popular business aircraft
  • Simplified Installation
  • Meets Global ADS-B mandate requirements
  • Lightweight and low power consumption
  • For Extended coverage, roll the MST 70B into your existing Honeywell Avionics Protection Plan
$31,995 MSRP

The MST 70B is DO-260B (FAA) compliant to meet the global Automatic Dependent Surveillance-Broadcast (ADS-B) mandates for aircraft that are required to have ADS-B Out capability. The light-weight MST 70B transmits ADS-B Out data from your aircraft to other nearby aircraft and Air Traffic Control (ATC). The higher level of ADS-B Out (DO-260B) transmission includes precise flight data, including position, speed and intent of the aircraft.

The MST 70B is an ICAO Level 3 transponder, delivering the latest functionality required for ICAO ACAS II mandate compliance; European Elementary Surveillance (ELS) and Enhanced Mode S Surveillance (EHS), Downlink of Aircraft Parameters (DAPs) and ADS-B 1090ES extended squitter.

Software upgrades to the MST 70B are performed through on-board software loads, providing operators with significant cost savings and scheduling flexibility.


Compatible Aircraft

  • Bombardier CL-600, 601, 604, DHC-7 and DHC-8 Series
  • Learjet 25, 25 (A through F), 31, 31A, 35, 35A, 36, 36A and 55
  • Textron/Cessna Citation 550, S550, 560 and 650
  • Boeing DC-9-15
  • de Havilland Dash 7 and Dash 8
  • Hawker Beechcraft 125-400A, 600, 700, 700A, 800, 800A, 800B and 800XP
  • Dassault Falcon Jet 10, 20, 50, 200, 900 and 900EX
  • Sabreliner NA-265-40/60/65
  • Gulfstream G-II, G-IIB, G-III and G-IV
  • Fokker F28
  • IAI Westwind 1124, 1125 and G-I
  • Saab 340A

Technical Specifications

Physical Description MST 70B
Size (inches) 7.62 (H) x 2.25 (W) x 12.4 (L)
Weight 5.5 lbs.
Mounting ARINC 404A, 1/4 ATR Short
Cooling Internal
Environmental DO-160G
TSO/JTSO C112d, C166b / C112d
Software DO-178B Level B
Transponder Data Link Capability ICAO Level 3 (COMM-A/B/C)
ADS-B Capability 1090ES Extended Squitter per RTCA DO-260B MOPS for 1090 ADS-B Equipment
Operating Altitude Sea level to 55,000 feet
Operating Temperature -55 to +70 degrees C
Storage Temperature -55 to +85 degrees C
Power 28V DC
Power Consumption 28 Watts (standby), 55 Watts (maximum)
Number of Antenna Ports 2 (diversity)
Controller Low speed ARINC 429
TCAS II High speed ARINC 429
GPS High or low speed ARINC 429
Altimeter ARINC 429/575 (digital air data)
Flight Identifier Various
Maintenance Computer Low speed ARINC 429


MST 70B Product Data Sheet Download
MST 70B Operator's Buying Guide Download