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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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07/06/21

Message Overview:

Message Name:

L N1 INDICATION SHOWS DASHES ON EICAS PRIMARY DISPLAY

Message Code: 773OBS003
Effectivity: All
System: Engine Indicating System
System Description: 77-30-00
Schematic Diagram: 77-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 77-31-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

This gives an indication that no vibration data is transmitted for the Left Engine.

Possible Causes:

  • Left Engine Vibration-Monitoring Unit (EVMU)

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • NTO Bulletin 88 - Engine Vibration Monitoring Unit (EVMU) Amber dashing of the Engine N1 vibration indication

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Connect Electrical Power to the Aircraft AMM 24-00-00-861-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Remove the Electrical Power from the Aircraft AMM 24-00-00-861-802 [ 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 ]
Engine Safety Precautions AMM 71-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Start the Engine AMM 71-00-00-866-806 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Engine Shutdown (Usual) AMM 71-00-00-866-809 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Engine Vibration-Monitoring Unit (EVMU) AMM 77-31-04-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Vibration-Monitoring Unit (EVMU) AMM 77-31-04-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Check the Part Number of the EVMU and if it is prior to B14 review the NTO bulletin 88 (See TS tips above for link to bulletin).
  2. Access CAIMS active or stored faults. Check if the fault message EVMU [VIBRATION CARD] FAULT is displayed?

    1. If the fault message is displayed, replace Left EVMU and continue with next step
    2. If the fault message is not displayed, continue with next step.

  3. Check if one of the following fault messages appear in CAIMS.

    1. If the fault message is displayed, go to the applicable troubleshooting task in SmartFix.
    2. If the fault message is not displayed, continue with next step.

  4. Use the troubleshooting procedures in the above CAIMS messages to troubleshoot the system further.
  5. Do close out.

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