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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.

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For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

06/14/19

Message Overview:

Fault Message:

ADLU ARINC TX 3 FAULT

Fault Code:

2320021TDY

Associated CAS:

None

Reporting LRU: Airborne Data Link Unit (ADLU)
System Description: 23-23-00
Schematic Diagram: 23-23-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 23-23-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
23-23-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Airborne Data-Link Unit (ADLU) ARINC 429 Transmitter #3 firmware failure.

Possible Causes:

  • Airborne Data Link Unit (ADLU) (A239)
  • Very High Frequency (VHF) Communication Unit 3 (A226)
  • Cockpit Printer (A241)
  • Data Acquisition Unit (DAU) 1 (A17)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

This Transmitter is used for VHF COM 3, DAU 1, AND THE COCKPIT PRINTER. ADLU may be displayed in red color on CAIMS PMAT.

Quick Links:

Removal of the Airborne Data-Link Unit AMM 23-23-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Airborne Data-Link Unit AMM 23-23-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Initialization of the Flight Management System (FMS) AMM 34-61-00-840-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Operate the Airborne Data-Link System using VHF network to receive the terminal text weather information. Deactivate SATCOM and Telephony systems by respective circuit breakers. Is the terminal text weather information displayed?
    NOTE: Do the initialization of the Flight Management System (FMS). Make sure aircraft is within VHF range of ACARS data communication ground station and VHF #3 is operative.

    1. If YES, go to step 3.
    2. If NO, continue with next step.

  2. Perform wiring checks, short to ground and pin/socket retention check between the Airborne Data-Link Unit (ADLU) connector A239BP1 and the VHF COM #3 connector A226P1. Is it satisfactory?

    1. If YES, go to step 7.
    2. If NO, repair or replace the defective wiring as required per WM 20-12 and do close out.

  3. Check if the Flight Compartment Printer is installed?

    1. If NO, go to step 6.
    2. If YES, continue with next step.

  4. Operate the Airborne Data-Link System using VHF network to receive the terminal text weather information and print that on the Flight Compartment Printer. Make sure that the cockpit printer is selected ON and has sufficient quantity of paper available. Verify that the cockpit printer output is legible and is identical to the received message. Is the cockpit printer output legible and identical to the received message?

    1. If YES, go to step 6.
    2. If NO, continue with next step.

  5. Perform wiring checks, short to ground and pin/socket retention check between the Airborne Data-Link Unit (ADLU) connector A239BP1 and the Flight Compartment Printer connector A241P1. Is it satisfactory?

    1. If YES, go to step 7.
    2. If NO, repair or replace the defective wiring as required per WM 20-12 and do close out.

  6. Perform wiring checks, short to ground and pin/socket retention check between the Airborne Data-Link Unit (ADLU) connector A239BP1 and DAU 1 connector A17CP1. Is it satisfactory?

    1. If YES, verify that CAIMS fault code 2320021TDY "ADLU ARINC TX 3 FAULT" is not displayed on PMAT and do close out.
    2. If NO, repair or replace the defective wiring as required per WM 20-12 and do close out.

  7. Replace the Airborne Data-Link Unit (ADLU) (ADLU ARINC 429 Transmitter #3 is faulty).
  8. Do close out.

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