INTEGRATED AVIONICS – GENERAL
The aircraft avionics are integrated into the Honeywell PRIMUS EPIC®
system whose architecture is based on:
• 2 × Modular Avionics Units (MAU 1 and MAU 2)
• 4 × Display Units (DU 1 thru DU 4)
• 2 × Modular Radio Cabinets (MRC 1 and MRC 2)
The two Modular Avionics Units:
• handle, compute and distribute data of all aircraft systems to the four
Display Units
• interface mechanical and virtual controllers to control the displays and
the avionics
• integrate the functions of crew alerting, navigation and autoflight
systems
The four Display Units provide crew with the information necessary for flight
conduct, navigation, situation awareness and aircraft system monitoring.
Each pilot has two Display Units, one acting as PFD (Primary Flight Display)
and one acting as MFD (Multi-Function Display). (See chapter 31-60)
The two Modular Radio Cabinets:
• integrate all the standard radios
• handle the digital audio signals and the digital data to/from the radios
(See chapter 23-00 for detailed description of MRC)
The system includes a Central Maintenance Computer (part of MAU1) to
monitor the operation of the helicopter and record events requiring
maintenance actions.
The standard configuration for the Honeywell PRIMUS EPIC® system
includes the following:
• 4 × Display Units (DU)
• 2 × sets of Controllers for the Display Units
• 2 × Multifunction Control Display Units (MCDU)
• 1 × Inter-Communications System (ICS)
• 2 × VHF communication radio systems (COM)
• 2 × VOR / ILS / MB systems (VHF-NAV)
• 1 × Distance Measuring Equipment (DME)
• 1 × Automatic Direction Finder (ADF)
• 2 × Flight Management Systems (FMS)
• 1 × Global Positioning System (GPS)
• 2 × Air Data Systems (ADS)
• 2 × Attitude and Heading Reference Systems (AHRS)
• 1 × ATC Transponder (XPDR)
• 1 × Radio Altimeter (RAD ALT)
• 2 × Automatic Flight Control Systems (AFCS) including dual Autopilot
(AP) and dual Flight Director (FD)
and the following optional systems:
• Weather Radar (WX)
• Lightning Sensor System (LSS)
• High Frequency (HF) communication radio system
• Traffic Alert and Collision Avoidance System (TCAS)
• Enhanced Ground Proximity Warning System (EGPWS)
The PRIMUS EPIC® system also supplies interfaces for other equipment
installed on the helicopter.