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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

06/29/21

Message Overview:

Message Name:

HYD 1 QUANTITY INDICATION

Message Code: 293OBS002
Effectivity: All
System: Engine Indicating
System Description: 29-30-00
Schematic Diagram: 29-12-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 29-00-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

On the Engine Indication and Crew Alerting System (EICAS) Hydraulic Synoptic Page, hydraulic quantity indication is in error.

Possible Causes:

  • Hydraulic System 1 Reservoir
  • Hydraulic System 1 Reservoir Quantity Transducer (MT139)
  • Data Acquisition Unit (DAU) 1 (A17)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Notice To Operators (NTO): None

Flight Operation Notifications Manual (FONM): None

Quick Links:

Removal of the No. 1 and No. 2 Hydraulic System Reservoirs AMM 29-12-25-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 1 and No. 2 Hydraulic System Reservoirs AMM 29-12-25-400-801 [ 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 ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Interchange 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.

  2. Perform wiring check between hydraulic system 1 reservoir quantity transducer (MT139) and DAU 1.

    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.

  3. Replace Hydraulic Reservoir 1.
  4. Do close out.

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