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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

09/18/19

Message Overview:

Fault Message:

SHORT- INLET PRESS SNSR/POS SIG WRG

Fault Code:

4960192APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-60-00
Schematic Diagram: 49-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 49-12-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Inlet Pressure Sensor high side conditioning voltage in the Full-Authority Digital Engine-Controller (FADEC) is out of range low and the signal read by the FADEC is out of range low.

Possible Causes:

  • Auxiliary Power Unit (APU) Full-Authority Digital Engine-Controller (FADEC) (A108)
  • Inlet Pressure Sensor (MT1)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Opening of Non-Thermal Circuit Breakers AMM 24-00-00-863-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of Non-Thermal Circuit Breakers AMM 24-00-00-863-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Stored Faults AMM 45-45-00-970-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Flight Deck Effect to Fault Correlations AMM 45-45-00-970-821 [ Global Express ]  [ G5000 ]  [ Global XRS ]
APU Safety Precautions AMM 49-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Engine Branched Wiring-Harness AMM 49-12-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Branched Wiring-Harness AMM 49-12-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Full-Authority Digital Engine-Controller (FADEC) AMM 49-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Full-Authority Digital Engine-Controller (FADEC) AMM 49-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Inlet Pressure Sensor AMM 49-61-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Inlet Pressure Sensor AMM 49-61-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Open the Auxiliary Power Unit (APU) Access Doors (321BB) AMM 52-43-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Close the Auxiliary Power Unit (APU) Access Doors (321BB) AMM 52-43-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Safety Precautions - Maintenance Practices - ALL SPM 20-00-01-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Check the engine branched wiring-harness for bare wiring, kinks, worn areas and other damage.

    1. If there is a damage, replace the engine branched wiring-harness and do close out.
    2. If there is no damage, continue with next step.

  2. Disconnect the MT1P1 connector from the inlet pressure sensor (MT1). Check the inlet pressure sensor (MT1) receptacle for contamination and damage.

    1. If there is a damage, go to step 8.
    2. If there is no damage, continue with next step.

  3. Perform a continuity check within the inlet pressure sensor (MT1) receptacle. Is the resistance value between 1000 to 4000 ohms?

    From To Expected Result Result
    MT1P1-A MT1P1-B 1000 - 4000 ohms

    1. If NO, go to step 8.
    2. If YES, continue with next step.

  4. Perform a continuity check within the inlet pressure sensor (MT1) receptacle. Is the resistance value between 500 to 2000 ohms?

    From To Expected Result Result
    MT1P1-C MT1P1-D 500 - 2000 ohms

    1. If NO, go to step 8.
    2. If YES, continue with next step.

  5. Disconnect the P802 connector at the APU firewall interface (FS1046 LHS). Perform a continuity check between the connectors that follow. Is the resistance value less than one ohm for each wire?

    From To Expected Result Result
    P802-19 MT1P1-A <1 ohm
    P802-20 MT1P1-B <1 ohm
    P802-43 MT1P1-C <1 ohm
    P802-44 MT1P1-D <1 ohm

    1. If NO, replace the engine branched wiring-harness and do close out.
    2. If YES, continue with next step.

  6. Remove FADEC (A108) and perform a continuity check between the connectors that follow. Is the resistance value less than three ohms for each wire?

    From To Expected Result Result
    P802-19 A108AP1-D3 <3 ohms
    P802-20 A108AP1-E3 <3 ohms
    P802-43 A108AP1-A3 <3 ohms
    P802-44 A108AP1-B3 <3 ohms

    1. If NO, repair defective wiring as required and do close out.
    2. If YES, continue with next step.

  7. Replace the FADEC (A108).

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

  8. Replace Inlet Pressure Sensor (MT1).
  9. Do close out.

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