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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:

N2 VIBRATION EXCEEDANCE

Message Code: 771OBS009
Effectivity: All
System: Engine Indicating System
System Description: 77-10-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

This procedure is for the Engine that has N2 Vibration Exceedance. It gives data to do an inspection of Engine Components to make sure that they are serviceable. If you are not sure about the Vibration indication, the fault isolation procedure for the Engine VIBRATION Indication on the Engine Indication and Crew Alerting System (EICAS) Primary Display must be followed before this procedure.

Possible Causes:

None

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-71-0575 - Engine Compressor Drum Coating Loss

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Detailed Inspection of the Engine after Bird Strike AMM 05-52-04-220-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Detailed Inspection of the Engine after Shedding/Ingestion of Ice AMM 05-52-06-220-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Engine Safety Precautions AMM 71-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
General Visual Inspection of the Engines - Internal AMM 71-00-00-210-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Opening of the Cowls AMM 71-10-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of the Cowls AMM 71-10-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Special Detailed Inspection of the HP Turbine Blades AMM 72-40-00-220-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Special Detailed Inspection of the HP Turbine Stage-1
Nozzle Guide-Vanes		 AMM 72-40-00-220-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Engine Vibration-Monitoring Unit (EVMU) AMM 77-31-04-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
General Visual Inspection of the Exhaust Nozzle AMM 78-10-01-210-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
General Visual Inspection of the Exhaust Cone AMM 78-10-02-210-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
General Visual Inspection of the Thrust Reverser AMM 78-30-00-210-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Detailed Inspection of the Front-Bearing-Chamber Magnetic Chip-Detector AMM 79-21-04-220-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Detailed Inspection of the Rear-Bearing-Chamber Magnetic Chip-Detector AMM 79-21-04-220-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Detailed Inspection of the Accessory-Gearbox Magnetic Chip-Detector AMM 79-21-04-220-803 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Vibration Survey of the engine EMM 71-00-00-970-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the compressor fairings EMM 72-03-01-000-801-A02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the compressor fairings EMM 72-03-01-400-801-A02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Inspection of the high pressure compressor EMM 72-33-00-220-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the bypass duct access panels EMM 72-71-02-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the bypass duct access panels EMM 72-71-02-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
General Visual Inspection of the Fuel Manifold EMM 73-12-03-220-801-A01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

NOTE: During the fault isolation procedure, if you repair any defects, complete the vibration survey of the engine before proceeding to the next part of the procedure. If the survey is satisfactory, no further maintenance is required.

  1. Perform a general visual inspection of the engine - internal.

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  2. Perform a visual inspection of the exhaust for damage and/or debris as follows:

    • Perform a visual examination of the exhaust con.
    • Perform a visual examination of the exhaust nozzle

    1. If any damage and/or debris found, repair the damage as required and do close out.
    2. If no damage found, continue with next step.

  3. Perform a general visual inspection of the fuel manifold.

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  4. Perform an inspection of the thrust reverser.

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  5. Perform the detailed inspection of the Magnetic Chip Detectors.

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  6. Perform a visual inspection of the Variable Stator Vane System (VSV) as follows:

    • Get access to the VSV mechanism:

      • Open the upper and lower cowl doors
      • Remove the applicable access panels from the bypass duct
      • Remove the compressor fairings

    • Use a strong, flameproof light source and a magnifying glass (Minimum 10X magnification). Visually examine the VSV mechanism as far as possible for damaged, broken or missing components. Look carefully for cracks, bends or distortion of the rods and levers
    • Close access to the VSV mechanism:

      • Install the compressor fairings
      • Install the applicable access panels to the bypass duct
      • Close the upper and lower cowl doors

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  7. Perform an inspection of the High Pressure (HP) compressor.

    1. If any damage found, repair as required and do close out.
    2. If no damage found, continue with next step.

  8. Perform an inspection of the High Pressure (HP) turbine blades and Nozzle Guide Vanes (NGV) and repair if any damage found.
  9. Do close out.

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