background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults By CAIMS By Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

07/06/21

Message Overview:

Message Name:

R HIGH N1 VIB INDICATION ON EICAS PRIMARY DISPLAY

Message Code: 773OBS005
Effectivity: All
System: Engine Vibration 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 of N1 vibration exceedance. The N1 VIB indication will show on the Engine Indication and Crew Alerting System (EICAS) primary page in amber color. This could also be an incorrect N1 vibration exceedance indication because of a defective vibration indication system.

The fault isolation procedure below gives data:

  • To make sure the vibration indication system is serviceable
  • To do inspections of the Engine when a correct N1 vibration indication is given

Possible Causes:

  • Vibration Transducer
  • Engine Vibration Monitoring Unit (EVMU) (A42)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

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 Active Faults AMM 45-45-00-970-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Stored Faults AMM 45-45-00-970-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Engine Safety Precautions AMM 71-00-00-910-801 [ 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. Access active or stored faults on the PMAT. Check if the fault message EVMU [VIBRATION CARD] FAULT is displayed.

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

  2. Check if one of the following fault messages is displayed in CAIMS:

    1. If the fault message is displayed, perform the applicable troubleshooting procedure and continue with next step.
    2. If the fault message is not displayed, continue with next step.

  3. After a correct N1 vibration indication is given, check if the fault message R ENG FAN−TRIM BALANCE is displayed in CAIMS.

    1. If the fault message is displayed, perform the applicable maintenance task and do close out.
    2. If the fault message is not displayed, continue with next step.

  4. Perform the troubleshooting for N1 vibration exceedance.
  5. Do close out.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.