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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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06/22/21

Message Overview:

Message Name:

ELECTRICAL SYSTEM TROUBLESHOOTING VIA EMS CDU SIGNBOARD

Message Code: 247OBS003
Effectivity: All
System: Electrical Power
System Description: 24-70-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

ELEC SYS FAULT or ELEC SYS FAIL CAS message posted and CAIMS not available for troubleshooting. Battery Bus is the only available source of power due to failure.

Possible Causes:

  • AC Power Center (ACPC) (A54)
  • DC Powr Center (DCPC) (A63)
  • Secondary Power Distribution Assembly (SPDA) 1 (A13)
  • Secondary Power Distribution Assembly (SPDA) 2 (A14)
  • Secondary Power Distribution Assembly (SPDA) 3 (A15)
  • Secondary Power Distribution Assembly (SPDA) 4 (A16)
  • Electrical Management System Control Display Unit (EMS CDU) 1 (A94)
  • Electrical Management System Control Display Unit (EMS CDU) 2 (A91)

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-24-0136 - "ELEC SYS FAULT" or "ELEC SYS FAIL" Nuisance Messages Associated with DCPC Diodes

Forum Articles/Infoservice/Newsletter: None

  • Certain Electrical Systems Failure modes can prevent CAIMS PMAT from being available due to loss of power to PMAT or supporting systems. In these cases the use of SIGNBOARD accessed through the EMS-CDU's is a possible way to determine the cause of the problem. Once the SIGNBOARD Label and Built-In Test (BIT) for the problem are found, see the cross reference to the CAIMS Fault Code number which is how to access the SmartFixPlus Troubleshooting CAIMS by Fault Code

Quick Links:

Access of Signboard Menu in EMS CDU AMM 24-00-00-946-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Exit of Signboard Menu in EMS CDU AMM 24-00-00-946-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Open the B6 EMS CDU Diagnostics guide and follow the instructions to identify the faulty component.
  2. Use the relevant table associated to the identified faulty unit from the list below to interpret the data recorded in the previous step.

  3. On the EMS CDU, select the EMER CNTL key to exit from the diagnostics mode.
  4. Based on the CAIMS fault code retrieved from the tables, perform the appropriate SmartFix Plus troubleshooting by CAIMS procedure.
  5. Do close out.

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