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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

04/26/21

Message Overview:

Message Name:

NO CABIN AUDIO

Identifier: 441OBS023
Effectivity: Aircraft 20501 - 20999
System: nice® HD Cabin Management System
Associated CAS: None
Reporting LRU: GCP4110-001-001
System Description: SmartFix Plus 44-00-00, TUG C-ABT207-UG-001
Schematic Diagram: TUGC-ABT207-UG-001
Wiring Diagram: SWDM W1002467113 CMS Power Distribution
SWDM W1004411113 CMS Network
SWDM W1004411133 CMS Control
SWDM W1004421113 Personal Control System

Message Description:

Cabin audio not available.

Possible Causes:

  • Audio Power Amplifier (APA) was replaced
  • Audio Power Amplifier (APA) status shows "update required"
  • Audio Power Amplifier (APA) is defective

Required Conditions:

  1. Ensure the nice® HDsystem is booted up completely (power on and wait for about 10 minutes to ensure proper system status reporting).
  2. USB stick with latest released system software.
  3. Check if special requirements apply and ensure necessary tools are available in reference to Software Load Procedure for nice® HD on CL350 (C-ABR142-UG-001), chapter 3. e.g.: DRM update requires internet connection.

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-44-0307 - Cabin Management System software Template 6 USB Jack Audio Issue
  • SB 350-44-001 - MODIFICATION - Cabin Management System (CMS) - System Configuration Database Software Update

Forum Articles/Infoservice/Newsletter:

  • To check for release of updated System Software - Configuration Server Database (CSDB), please refer to Bombardier CIC webpage technical library, Service Bulletins for Challenger 350.
  • Respective Lufthansa Technik "Engineering Bulletin Component" (EBC) documents are provided on this page as well.

More details in the nice® HD CMS/IFE system are available within the Lufthansa Technik document C-ABT207-UG-001, CL350 nice® HD Technical User Guide (TUG).

Quick Links:

Lufthansa Technik Technical User Guide (TUG) CL350 nice® HDC-ABT207-UG-001
Lufthansa Technik Software Load Procedure (SLP) CL350 nice® HDC-ABR142-UG-001

Troubleshooting Recommendations:

  1. On the Galley Control Panel (GCP) CMS Equipment page, check the APA status.

    1. If the status is "update available", proceed with Step 2.
    2. If the status is "not available" or "disconnected", proceed with Step 3.

  2. On the CMS Equipment page, Select the APA to start the update process of the APA. The unit will reboot and update its software automatically. After the software update is complete, check the status of the APA on the GCP CMS Equipment page.

    1. If the APA status is "ready", do close out.
    2. If the APA status is not "ready", refer to the Software Load Procedure to complete the system update.

  3. Access the APA and inspect the front panel LEDs on the unit:

    1. If the Power LED is on proceed with Step 5.
    2. If Power LED is off, continue with next step.

  4. Perform a 28 VDC check on J1 Pin A2 (DC-GND) and A3 (28 VDC).

    1. If 28 VDC is available, replace the APA and do close out.
    2. If 28 VDC is not available, check circuit breaker, wiring and power source and rectify as required.

  5. Check the Link status light on the connector side of the unit:

    1. If the Link light is off, continue with next step.
    2. If the Link light is on, go to Step 7.

  6. Check the connections, associated wiring and installation of the APA.

    1. If defects are found, rectify as required and do close out.
    2. If no defects are found, continue with next step.

  7. Replace the APA.
  8. Do close out.

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