Part #:

Model: KT-74




Mode S/ADS-B Transponder

Part Number :

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  • Now FAA TSO C166b
  • Meets ADS-B 2020 requirements (when connected to a compatible GPS source)*
  • Slide-in replacement for the popular BendixKing KT 76A/C and KT 78A transponders (See KT-74 FAQ)
  • Provides a simple and economical upgrade path for ADS-B*
  • Push button operation
  • New sleek design
  • Most affordable Mode S Transponder with ADS-B Out*
  • Low power consumption
  • Stopwatch and timer
  • Altitude monitor
  • Built-in altitude repeater instead of a second altitude encoder
  • TIS-A Traffic output
  • Trig Avionics manufacturers and holds the TSO for the KT-74
    • Both Trig and Bendix King PNs are on the unit
    • Must be ordered from Bendix King 
Click Here to view KT-74 demo video


Size: 6.30"W x 1.7"H x 10.7"L Weight: 2.98 lbs.
TSO: C112D, C166B and ETSO C112C, C166B Temperature: -20 to +70C
typical current consumption (at 14V): Idle: 0.22 A, Active: 0.45 A nominal transmitter power: 240 W at connector
Type: Class 1 Mode S Level 2 els Voltage: 11-33 V DC
Compliance: DO-160G, DO-181E, DO-260B Class B1S, DO-178B Level B, DO-254 Level C Cooling: No fan required


Part Number: Description:
89000007-000001 Unit only (Trig PN: 01157-00-01)
89000007-002001 Includes Install Kit (Trig PN: 01158-00-01) 
89000007-000001 Unit only (Trig PN: 01157-00-01)
89000007-002002 Citation Jet CNI-5000 Version


- Mode S/ADS-B Transponder
Price Condition Status
- 01157-00-02 ADS-B Transponder (Gray, CNI-5000)
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

The KT-74 is a direct replacement only if ADS-B is not being utilized. The KT-74 is designed to fit into an existing KT-76A/C & KT-78A tray. However to utilize the ADS-B feature of the KT-74, a secondary connector and new tray will need to be installed.

The KT-74 has two Molex edge connectors. The primary connector can use the same contact positions and are electrically compatible with the KT-76A & KT-78A (if properly wired). A secondary connector would need to be installed to utilize ADS-B functions, resulting in a necessary second hole in the rack to accommodate the connector.

Honeywell has obtained STC# SA00765DE for the installation of the KT-74 for ADS-B Out functionality in a multitude of aircraft.  There is an Approved Model List that accompanies the STC.  Please see Resources for copies of the STC.

The KLN-94 is not a WAAS GPS, nor is it upgradeable to one. We recommend the KT-74, but if you decide to upgrade to a GPS400W or GNS430W, then you would want to go with a GTX-330.

In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.