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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

08/13/19

Message Overview:

Fault Message:

HYD 3 LO PRESS

Fault Code:

0000H3LP

Associated CAS:

HYD 3 LO PRESS
(Caution)

Reporting LRU: Hydraulic System 3
System Description: 29-13-00
Schematic Diagram: 29-13-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 29-00-05 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Hydraulic System 3 is less than 1800 psi.

Possible Causes:

  • Data Acquisition Unit (DAU) 3 (A30)
  • AC Motor Pump (ACMP) 3A (B53)
  • AC Motor Pump (ACMP) 3B (B54)
  • Hydraulic Fluid Filter Elements
  • Hydraulic System 3 Pressure Transducer (MT146)
  • Hydraulic System Filter Manifold 3
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletins: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Quantity Check of the Hydraulic Fluid in the No. 3 Hydraulic System AMM 12-12-00-610-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 3 Hydraulic-System AC-Motor-Driven Pumps AMM 29-13-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 3 Hydraulic-System AC-Motor-Driven Pumps AMM 29-13-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 3 Hydraulic-System Filter Manifold AMM 29-13-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 3 Hydraulic-System Filter Manifold AMM 29-13-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 3 Hydraulic-System Pressure-Filter Element AMM 29-13-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 3 Hydraulic-System Pressure-Filter Element AMM 29-13-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 3 Hydraulic-System Return-Filter Element AMM 29-13-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 3 Hydraulic-System Return-Filter Element AMM 29-13-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 3 Hydraulic-System Case-Drain Filter-Elements AMM 29-13-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No.3 Hydraulic-System Case-Drain Filter-Elements AMM 29-13-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Hydraulic Pressure Transducers AMM 29-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Hydraulic Pressure Transducers AMM 29-31-01-400-801 [ 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 ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Ensure system is properly serviced.

    1. If low quantity found, service and recheck system. If system checks are good, do close out.
    2. If quantity is good, continue with next step.

  2. Operate 3A and 3B Hydraulic ACMPs independently. Confirm pump operation on Hydraulic Synoptic page.

    1. If pump(s) fail to operate, replace applicable pump and retest. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  3. Inspect system filter DPIs.

    1. If DPIs are tripped, replace filter(s) and recheck system. If system checks are good, do close out.
    2. If DPIs are good, continue with next step.

  4. Swap Hydraulic System 3 Transducer (MT146) and Hydraulic System 1 Transducer (MT140).

    1. If system checks are good, replace Hydraulic System 3 Transducer and do close out.
    2. If fault remains, continue with next step.

  5. Swap DAU 3 with DAU 4.

    1. If system checks are good, replace DAU 3 and do close out.
    2. If fault remains, continue with next step.

  6. Perform wiring checks between hydraulic system 3 filter manifold transducer (MT146), DAU 3 and SPDA 3.

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

  7. Ensure 28 VDC input from SPDA 3 to transducer.

    1. If there is 28 VDC, go to step 9.
    2. If there is no 28 VDC, continue with next step.

  8. Swap SPDA 3 and SPDA 2.

    1. If system checks are good, replace SPDA 3 and do close out.
    2. If fault remains, continue with next step.

  9. Replace the Hydraulic System 3 Filters.

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

  10. Swap Hydraulic System Filter Manifolds 3 with Hydraulic System Filter Manifolds 2.

    1. If system checks are good, replace Hydraulic System Filter Manifolds 3 and do close out.
    2. If fault remains, continue with next step.

  11. Accomplish Hydraulic System 3 Internal Leakage Check.
  12. Do close out.

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