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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

09/25/19

Message Overview:

Fault Message:

L FUEL FILTER DIFF PRESS WRG/SWITCH

Fault Code:

7326515LBR

Associated CAS:

L R FUEL FILTER
(Caution)

L FUEL FILTER
(Advisory)

Reporting LRU: Engine Electronic Controller (EEC) 1
System Description: 73-30-00
Schematic Diagram: None
Wiring Diagram: 71-50-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

A Low Pressure (LP) Fuel Filter Differential Pressure Switch fault has been detected during engine pre-start check.

Possible Causes:

  • Low pressure (LP) Fuel Filter Differential Pressure Switch (P1079)
  • Left Engine Electronic Controller (EEC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

  1. The EEC continuously monitors the differential pressure switch circuit.The EEC will generate a switch failure signal if the LP fuel filter differential press switch contact is open before the engine start. This gives an indication that the switch is defective.
  2. The switch will open when the fuel filter differential pressure is 5±2 psid.
  3. The fuel filter bypass valve will open at 25±1 psid and will trigger the mechanical pop-up indicator on the fuel filter.

Fuel Synoptic page: Indication of a Fuel Filter blockage due to a LP filter differential pressure switch failure or impending filter blockage is detected.

Quick Links:

Opening of the Cowls AMM 71-10-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of the Cowls AMM 71-10-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Eng Electronic Controller (EEC) Mod 73-101559 EMM 73-21-01-000-801-B00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Eng Electronic Controller (EEC) Mod 73-101559 EMM 73-21-01-400-801-B001 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the LP Fuel Filter Differential Pressure Switch EMM 73-34-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the LP Fuel Filter Differential Pressure Switch EMM 73- 34-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform a continuity check of LP Fuel filter differential pressure switch.

    1. If there is no continuity, repair defective wiring as required and do close out.
    2. If there is continuity, continue with next step.

  2. Perform wiring checks between connector Pressure Switch and EEC.

    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. Swap LP Fuel Filter Differential Pressure Switchs.

    1. If system checks are good, replace defective LP Fuel Filter Differential Pressure Switch and do close out.
    2. If fault remains, continue with next step.

  4. Replace EEC 1.
  5. Do close out.

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