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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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11/06/24

Message Overview:

APU FAULT
(Advisory)

DDG Reference: 49-52-01
Pilot Action (QRH): APU 01-6
System Description: 49-60-00 - Engine Controls
Schematic Diagram: 49-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

A single speed sensor or Exhaust Gas Temperature (EGT) Thermocouple rake is detected or the Fuel Solenoid has failed to close or the Fuel/Oil Filters have gone into impending bypass or the Low Oil Pressure (LOP) Switch is failed (in flight only).

Possible Causes:

  • Exhaust Gas Temperature (EGT) Sensor (TC1)
  • Auxiliary Power Unit (APU) Full Authority Digital Engine Controller (FADEC) (A108)
  • Fuel Solenoid Valve (V2)
  • Fuel/Oil Filter
  • Low Oil Pressure Switch (LOP) (S1)
  • Lube Filter Differential Pressure Switch (S2)
  • Generator Filter Differential Pressure Switch (S3)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

Quick Links:

Access to View Fault Messages AMM 45-45-00-970-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Ful-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 Exhaust Gas Temperature (EGT) Sensor AMM 49-61-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Exhaust Gas Temperature (EGT) Sensor AMM 49-61-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Low Oil-Pressure Switch AMM 49-90-41-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Low Oil-Pressure Switch AMM 49-90-41-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-12 [ Global Express ]  [ G5000 ]  [Global XRS ]

Troubleshooting Recommendations:

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