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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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06/03/19

Message Overview:

Fault Message:

[CPC2] SAFETY VALVE #2 /WRG

Fault Code:

2138427ABG

Associated CAS:

SAFETY VALVE OPEN
(Advisory)

Reporting LRU: Cabin Pressure Controller (CPC) 2
System Description: 21-31-00
Schematic Diagram: 21-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-31-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Safety Valve 2 is detected not fully closed.

Possible Causes:

  • Cabin Pressure Controller (CPC) 2 (A22)
  • Data Acquisition Unit (DAU) 2 (A18)
  • Safety Valve 2 (L11)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Cabin Pressure Controllers AMM 21-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Cabin Pressure Controllers AMM 21-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Safety Valves AMM 21-31-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Safety Valves AMM 21-31-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Functional Test of the Safety Valves AMM 21-31-09-720-801 [ 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 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

NOTE: If the Cabin Maximum Differential pressure has been exceeded, disregard the troubleshooting below and investigate the pressurization system. Water spilled from the aft water system may disturb the static port airflow and consequently partially open the safety valves.

  1. Visually inspect for a water leak in the area of the static port.
  2. Swap DAU 2 with DAU 1.

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

  3. Perform wiring checks of the wire between the Safety Valve 2 and DAU 2.

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

  4. Replace CPC 2.
  5. Perform functional test of the safety valves.
  6. Do close out.

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