Part #:

Model: KMD-540




Multifunction Display (Black)

Part Number :
Bendix King logo


PLEASE NOTE: The KMD-540 is the actual display ONLY model number / nomenclature for the KMD-550/850 MFD System
  • Multifunction Display used in KMD-550 and KMD-850 Multi-Function Display Systems
  • Easy joystick control and multiple function keys used for operation (see panel key/control layout)
  • Standard display capabilities include moving map via compatible external GPS source and stormscope/lightning information
  • Up to four optional modules (i.e. KAC-501/502/503/504) can be installed into KMD-540 unit to expand display capabilities when used with w/ compatible sensors (see below)
  • Optional modules and compatible sensors expand unit to include traffic/TIS, weather radar, terrain and datalink weather display/information
  • Moving Map/GPS interface compatible with any GPS receivers that outputs RS-232 or ARINC 429 position information
  • Can accept ARINC 429 FMS position input when KAC-504 module is installed into KMD unit
  • Advanced features include NTSC-compatible video input port and simultaneous overlay from different sensors
  • Capable of receiving magnetic heading from several sources such as synchro XYZ, FMS/HDG, traffic ARINC 429, WX-500 and airdata (note: KAC-504 module must be installed for XYZ heading to operate)
  • Heading information used to correct difference between heading and track based display pages for overlay of flightplan info and other data
  • Cartographic database presents information such as airports, VORs, SUA, rivers, roads, and more
  • Can display holding patterns, procedure turns and DME arc when interfaced to KLN-94
  • Wide viewing angle
  • 2 year factory warranty
  • Available with black, gray, or Silver Crown type bezel
  • 0X01 units superseded by -1X01 units for improved RF Susceptibility as of October 2004 (see table below)

PLEASE NOTE: Compatible avionics listed are available at additional cost, not included


Weather Radar - (KAC-501 optional module required in KMD-540 - see example):

  • Bendix/King ART-2000 (w/ Mod 6 at Software Mod 01/09 or higher)
  • Bendix/King ART-2100 (w/ Mod 3 at Software Mod 01/04 or higher)
  • Bendix/King RS-811A (from RDS-81 System) Bendix/King RS-181A (from RDS-82 System) - P/N 071-1315-00 and -30 only
  • Bendix/King RS-841A (from RDS-84 System) - P/N 071-1318-00 and -30 only
  • Bendix/King RS-861A (from RDS-86 System) - P/N 071-1319-00 and -30 only
  • L3/Goodrich WX-500 (no interface modules required; interface is standard in KMD-540)
  • L3/Goodrich WX-1000E (note: only functional if KAC-504 module installed and WX processor has ARINC 429 output - P/N 78-8060-6086-5 or 78-8060-6092-3)

Traffic - (KAC-504 optional module required in KMD-540):
  • Bendix/King KTA-870
  • Bendix/King KMH-880
  • Bendix/King KT-73 TIS Unit (i.e. non-active "service" oriented traffic advisories)
  • L3/Goodrich Skywatch 497
  • L3/Goodrich Skywatch HP 899
  • Ryan 9900BX
  • Bendix/King CAS-66A TCAS I
  • L3/Goodrich TCAS-791 TCAS I
  • Bendix/King CAS-67A TCAS II (note: TPU-67A processor does not use KMD-540 as control head- consult TCAS manual)
  • Honeywell CAS-81A TCAS II (note: TPU-81A processor does not use KMD-540 as control head- consult TCAS manual)

Terrain - (KAC-502 optional module required in KMD-540):
  • Bendix/King KMH-880
  • Bendix/King KGP-560 EGPWS
  • Bendix/King KGP-860 EGPWS
  • Honeywell Mark V EGPWS
  • Honeywell Mark VI EGPWS
  • Honeywell Mark VII EGPWS
  • Honeywell Mark VIII EGPWS
  • Honeywell Mark XXI EGPWS
  • Honeywell Mark XXII EGPWS (Click Here for a list of compatible EGPWS units)

Datalink Weather - (KAC-503 optional module required in KMD-540):
  • KDR-510 (Note: The KDR-510 is the only datalink weather system compatible with the KMD-540/550/850)

*DOWNLOADS* - Click Here to download the KMD-550/850 Pilots Guide - Click Here to download the KMD-550/850 Flight Information Service Addendum


Width: 6.2" (15.8 cm) Height: 4.0" (10.1 cm)
Depth: 10.0" (25.4 cm) Weight: 5.0 lbs.
Screen Size: 5.0" (12.7 cm) diagonal Temperature: -20 to +70C
Power Input: 10-33 VDC (20W) Certification:
FAA TSO C113, TSO C110a
Part Number Multifunction Display Description:
066-04035-0101 Black bezel
066-04035-0201 Gray bezel
066-04035-0301 Silver Crown bezel
066-04035-1101 Black bezel
066-04035-1201 Gray bezel with improved RF susceptibility
066-04035-1301 Silver Crown bezel with improved RF susceptibility


- Multifunction Display (Black)
Price Condition Status
- Multifunction Display (Silver Crown Bezel)
Price Condition Status
- Multifunction Display (Black)

NSN: 5841-01-552-0485

Price Condition Status
- Multifunction Display (Gray)
Price Condition Status
- Multifunction Display (Gray)
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

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.

The KMD-540 is the actual MFD unit included in the KMD-550/850 systems. Therefore, KMD-540 + Install Kit & Database = KMD-550. And, KMD-540 + KAC-501 radar module + Install Kit & Database = KMD-850. The KMD-550 and KMD-850 are merely system reference designations. The actual MFD unit does not have the KMD-550/850 part on it.
The KAC-504 traffic module must be installed into the KMD-540 MFD unit (P/N 066-04035-XX0X) to display the traffic information from the KT-73 TIS/Mode S transponder. It should be noted that the Traffic Information Service (TIS) is currently only available in certain areas of the United States.
No, the Collins radar transceivers are not compatible with the KMD-850 Multi Function Display.
The LCD in the original KMD-540 units (P/N 066-04035-0X01) are no longer available. The 066-04035-1X01 units include a new replacement LCD. Additionally, if the LCD is replaced in an original KMD-540 with the –0X01 dash number, then the part number is changed to the appropriate -1X01 status.
Click here to view a document containing the different database coverage areas.
The only difference between these versions is that the -0301/1301 versions have silver trim lining around the bezel. This version was produced to match existing Silver Crown avionics stacks.

Please see the example below of the different versions:
The KAC-501, 502, 503, and 504 modules can be added and removed to the KMD-540 display unit very easily. Labeled screws are removed from the side panel and the panel is slid back. A screw on the top for the locking bar is removed, the bar is turned 90 degrees counter-clockwise and then pulled up through the top of the unit. For detailed instructions, please view this page from the KMD-550/850 Installation Manual.
Many avionics systems require a configuration or setup process. This process is required to interface certain avionics systems to other systems in the aircraft that will be inputting or outputting information to and from these systems. Some examples of systems that require a configuration or setup process include:


In addition, most newer technology or solid state systems require configuration via computer interface of some type. A qualified avionics technician should always refer to the appropriate manufacturer's installation manual for complete information and instructions.
The KT-73 will fit into most of KT-70/71/76A/76C mounting racks and utilizes the same main connector. However, there are other factors to consider. First, the KT-73 rack includes a configuration module that will store aircraft parameters for the Mode S function. This configuration module is located in the silver box on the right side of the rack (please see photo). In addition, the configuration module has a male connector which can be seen when you peel off the silver tape from the box (see second photo). The designation of this connector is JKT73-4.

All of the TIS (traffic) interface connections for the KMD-550/850 interface are not located on the main connector of the KT-73 (JKT73-1). The TIS ARINC 429 data is output from the KT-73 into the KMD-540 MFD and then output from the KMD-540 into the small config module connector. The small mating connector for JKT73-4 can be purchased separately however it is more cost effective to simply purchase the entire KT-73 installation kit for this scenario.

In conclusion, when upgrading the KT-70/71/76A/76C transponder to the KT-73 with the intention of interfacing to the KMD-550/850 MFD for TIS traffic, you must purchase the correct KT-73 mounting rack and installation kit.

Negotiating the exchange price of a unit only limits the allowable repair cap for the core unit. Southeast Aerospace's exchange transactions are based on the return of economically repairable core unit. Once the core is received and evaluated, the core repair cost incurred by SEA cannot exceed 75% of the original exchange price. That is, it cannot cost SEA more than 75% of the original OH/SV exchange price collected from the customer. Therefore, when and if an SEA exchange price is discounted, there is a risk that additional charges may be assessed once the core is returned and evaluated.

KMD-540 datacards with P/N 071-00161-020X include a major software change to allow the unit to interface to the KDR-610 XM weather receiver. To enable the KMD-540 to accept a software change, Pin 17 on J3001 must be tied to ground. Attempting to upgrade the software from 01/XX to 02/XX without the upgrade enable pin grounded will result in the message:

"An upgrade has been found, but this unit is not strapped to allow the upgrade to take place. Switch the unit off and either strap the unit to allow the upgrade or re-insert the original version of software."

For complete information, refer to Honeywell SWB KMD 540-SW1 or contact the Southeast Aerospace Technical Team.
The KMD-550/850 system (i.e. KMD-540 display) will accept RS-232 or ARINC 429 as the position source. The ARINC 429 option requires the installation and configuration of a KAC-504 traffic card.
Per the Bendix/King Pilot’s Club Newsletter dated March 25, 2011, the KMD-540 has been rendered obsolete. According to the newsletters, Honeywell is working to design a suitable replacement. The issue and replacement could take 12-18 months to resolve as of March 2011. No supply will be available from Honeywell until that time.

Southeast Aerospace can provide suitable, functionally equivalent alternatives to the KMD-550/850 MFD System. Please contact our Sales Dept to inquire about alternatives and upgrades available for the KMD-550/850 MFD.