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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

06/22/21

Message Overview:

Message Name:

TRU AMBER OUTLINE ON DC SYNOPTIC PAGE

Message Code: 243OBS004
Effectivity: All
System: DC Power Conversion
System Description: 24-31-00
Schematic Diagram: 24-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-31-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
24-31-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

On the DC Synoptic page, a Transformer Rectifier Unit (TRUs) outline box is amber but the Voltage and Current values displayed in the TRU outline box are good and the DC buses are fed properly.

Possible Causes:

  • Transformer Rectifier Unit (TRU) 1 Fan (A73)
  • Transformer Rectifier Unit (TRU) 2 Fan (A74)
  • Essential (ESS) Transformer Rectifier Unit (TRU) 1 Fan (A75)
  • Essential (ESS) Transformer Rectifier Unit (TRU) 2 Fan (A76)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: An amber outline box for the TRU even though the TRU seems to function properly denotes a failed TRU fan.

Quick Links:

Removal of the Transformer Rectifier Units AMM 24-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Transformer Rectifier Units AMM 24-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) AMM 24-61-00-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) AMM 24-61-00-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) DC Power Quality Monitor AMM 24-61-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) DC Power Quality Monitor AMM 24-61-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Active Faults AMM 45-45-00-970-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Stored Faults AMM 45-45-00-970-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Access the TRU bay nose compartment.
  2. Swap the affected TRU with another TRU.

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

  3. Select one of the following troubleshooting pages associated to the affected TRU and perform the troubleshooting steps:
  4. Do close out.

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