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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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Quick Links

09/05/19

Message Overview:

Fault Message:

INTERFACE - AIR DATA 1 BUS FAULT

Fault Code:

3440103AE

Associated CAS:

GND PROX FAIL
(Advisory)

GPWS SYSTEMS FAIL
(Advisory)

WINDSHEAR FAIL
(Advisory)

Reporting LRU: Enhanced Ground-Proximity Warning System (EGPWS)
System Description: 34-42-00
Schematic Diagram: 34-42-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 34-41-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
34-42-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Loss of communication on ARINC 429 Fault Warning Computer (FWC) bus from Micro Air-Data Computer (MADC) 1 is detected by Enhanced Ground-Proximity Warning System (EGPWS) Computer.

Possible Causes:

  • Micro Air-Data Computer (MADC) 1 (A27)
  • Enhanced Ground-Proximity Warning System (EGPWS) Computer (A64)
  • Junction Box (JB) 3
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter:

Quick Links:

Removal of the Micro Air-Data Computers AMM 34-11-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Micro Air-Data Computers AMM 34-11-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Enhanced Ground-Proximity
Warning System (EGPWS) Computer		 AMM 34-42-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Enhanced Ground-Proximity
Warning System (EGPWS) Computer		 AMM 34-42-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Consult EGPWS - NFF reduction before performing the troubleshooting.
  2. Swap ADC 1 with ADC 2.

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

  3. Perform wiring checks between MADC 1, JB3 and EGPWS Computer.

    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.
      NOTE: Remove all interface components for short circuit checks.

  4. Replace EGPWS Computer.

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

  5. Replace JB3.
  6. Do close out.

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