When creating the Learjet 45, Bombardier and the Learjet team decided to choose Honeywell to develop the avionics system for the jet. The Learjet 45 Avionics system is the Honeywell Primus 1000, which was an integrated avionics system package that was available from Honeywell at the time the aircraft was created. In addition, the Bombardier Learjet 45 XR avionics are the same as the regular 45 since the XR is an upgraded engine version of the 45.
Overview of the System
Two primary flight displays and two multi-function displays are apart of the Learjet 45 avionics. The four screens are the Honeywell DU-870 and are 3.7 inches x 8 inches. An Engine Instrument and Crew Alerting System (EICAS) is also integrated into the Learjet 45 avionics. Also apart of the Learjet 45 avionics is the Flight Management System (FMS) unit located in the cockpit. Usually, the FMS unit in the Learjet 45 is the Universal UNS-1 FMS. One or two of the FMS units are situated on the flight deck, and newer Learjet 45s have an upgraded version of the FMS.
The Learjet 45 XR avionics are mostly the same as the Learjet 45 because they are the same aircraft. The only difference is the type of engines the jets have. However, there could be some differences as the XR could have some updated systems.
Avionics Systems Components
Here are some of the other commons avionics systems in Learjet 45 aircraft:
Honeywell Primus 660 Color Radar
RT-300 Radio Altimeter
Honeywell Primus II Integrated Radio System:
Dual RM-855 Radio Management Units (RMU)
Dual RCZ-833K Integrated (8.33 MHz) Communication Units Includes: VHF Com & Mode S Transponder (Enhanced Surveillance)
Dual RNZ-851 Integrated Navigation Units Includes: VHF Nav
(FM Immunity), Single ADF and Dual DME
Honeywell TCAS 2000 w Change 7
Honeywell Mark V Enhanced GPWS with -218 Software
Honeywell Solid State CVR 30
Learjet 45s with the proper equipment are Reduced Vertical Separation Minimum/Minima (RVSM) capable
Also, Learjet 45 avionics meet the Required Navigation avionics (RNP) standards and can be RNP capable.
Microsoft Flight Simulator X Avionics
The Learjet 45 is one of the aircraft that is part of the popular Microsoft Flight Simulator X or 10 program that was released in 2006 and is still available on Lockheed Martin’s Prepar3d program that a continuation of the Flight Simulator X software. In the simulator an accurate representation of the aircraft's avionics is shown. The program is a great way to learn more about the avionics system and how it works.
The Bombardier Learjet 45 avionics is also referred to as the LJ45 avionics and the Bombardier Learjet 45 XR avionics.
Above Learjet 45 Avionics Photo is one of the early Bombardier Learjet 45 Avionics. Photo Copyright Bombardier