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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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09/06/19

Message Overview:

Fault Message:

DAU1/WRG/FWC 37 FAULT (37)

Fault Code:

3440029WX

Associated CAS:

None

Reporting LRU: Weather Radar System
System Description: 34-41-00
Schematic Diagram: 34-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 31-42-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
34-41-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Weather Radar Transceiver (RTA) does not receiver communication from Data Acquisition Unit (DAU) 1 (GP bus). Amber FAIL legend and fault code 37 display in Multi-Function Display (MFD) status window.

Possible Causes:

  • Junction Box 3 (JB3)
  • Data Acquisition Unit (DAU) 1 (A17)
  • Weather Radar (WXR) Receiver/Transmitter (R/T) (A125)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

The FAIL legend and fault codes show on the MFD status window only when the WXR system is in TST (Test) mode and an active fault has occurred.

Quick Links:

Removal of the Junction Box JB3 AMM 24-00-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB3 AMM 24-00-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Data Acquisition Units (DAU) AMM 31-42-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Data Acquisition Units (DAU) AMM 31-42-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Weather Radar Receiver/Transmitter AMM 34-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Weather Radar Receiver/Transmitter AMM 34-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform a wiring check for open or short circuit to ground between WX RTA (A125P1), JB3 and DAU 1 (A17CP1).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  2. Swap DAU 1 with DAU 2.

    1. If system checks are good, replace DAU 1 and do close out.
    2. If fault remains, continue with next step.

  3. Replace WXR R/T.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step

  4. Replace JB3.
  5. Do close out.

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