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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

08/12/19

Message Overview:

Fault Message:

HYD PUMP 1B FAIL

Fault Code:

0000H1BF

Associated CAS:

HYD PUMP 1B FAIL
(Advisory)

Reporting LRU: Data Acquisition Unit (DAU) 2
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 ]

Fault Description:

Data Acquisition Unit (DAU) 2 is receiving an input that the Hydraulic Pressure Switch 1B is less than 1800 psi (low) with Hydraulic Pump Switch 1B selected to AUTO or ON.

NOTE: AC Motor Pump (ACMP) Pressure Switches close at 2400 psi (high) as pressure rises and opens at 1800 psi (low) as pressure decreases.

Possible Causes:

  • AC Power Center (ACPC) Secondary Logic Card
  • AC Motor Pump (ACMP) 1B (B51)
  • Hydraulic Pressure Switch 1B
  • AC Power Center (ACPC) (A54)
  • Data Acquisition Unit (DAU) 2 (A18)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Quantity Check of the Hydraulic Fluid in the No. 1 and No. 2 Hydraulic Systems AMM 12-12-00-610-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) AMM 24-51-00-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) AMM 24-51-00-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) Secondary Logic AMM 24-51-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) Secondary Logic AMM 24-51-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the No. 1 and No. 2 Hydraulic-System AC-Motor-Driven Pumps AMM 29-12-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the No. 1 and No. 2 Hydraulic-System AC-Motor-Driven Pumps AMM 29-12-05-400-801 [ 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 Hydraulic Pressure Switches AMM 29-31-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Hydraulic Pressure Switches AMM 29-31-05-400-801 [ 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 Hydraulic System 1 is properly serviced.
  2. Operate Hydraulic Pump 1B and note Hydraulic System 1 pressure.

    1. If pump operates and pressure in below 2400 psi, replace ACMP 1B and do close out.
    2. If pump does not operate, go to step 4.
    3. If pump operates and pressure is above 2400 psi, continue with next step.

  3. Swap Hydraulic Pressure Switch 1B and 2B.

    1. If system checks are good, replace Hydraulic Pressure Switch 1B and do close out.
    2. If fault remains, go to step 9.

  4. Perform voltage check at ACMP 1B. Check for 115 VAC at connector B51P1 between pins A and E, pins B and E and pins C and E.

    1. If voltage is not present, go to step 6.
    2. If voltage is present, continue with next step.

  5. Remove enough clamps to swap ACMP 1B connector B51P1 and ACMP 2B connector B52P1.

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

  6. Swap ACPC SLC AC 3 with SLC AC 2.

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

  7. Swap K20 relay with K17 relay in ACPC.

    1. If system checks are good, replace K20 relay and do close out.
    2. If fault remains, continue with next step.

  8. Perform wiring check between ACMP 1B, ACPC Relay K20, Hydraulic Pressure Switch 1B and DAU 2.

    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.

  9. Swap DAU 2 with DAU 4.

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

  10. Accomplish check of EMI filter as shown below.

    1. Remove ACPC Secondary Logic Card 3.
    2. Measure the EMI Filter continuity from connector P310 pin 22 to aircraft structure.

      1. If reading is ground, replace the ACPC and do close out.
      2. If reading is open, continue with next step.

    3. Measure for open circuit between SLC 3, connector P310, pin 22 to pin 25, pin 28, and pin 31.

      1. If reading an open, replace the ACPC.

  11. Do close out.

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