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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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Quick Links

10/10/19

Message Overview:

Fault Message:

L TR LOWER R STOW WRG/MICRO SW MA

Fault Code:

7327221LBR

Associated CAS:

None

Reporting LRU: Left Engine Electronic Controller (EEC)
System Description: 78-30-00
Schematic Diagram: 78-34-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 71-50-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

An open or short circuit is detected in the Thrust Reverser (TR) Lower Door Right Stow Switch or the interface wiring. A single contact of the switch is affected.

Possible Causes:

  • Door Stow Switch
  • Left Engine Electronic Controller (EEC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

  1. Open circuit faults is detected during the forward thrust mode, and short circuit fault is detected in the reverse thrust mode.
  2. TR Stow switch is also called the TR retracted switch.

Rolls-Royce NTO:

  • NTO 066, Issue 4 - TRU Binding Primary Door Lock Mechanism
  • NTO 135, Issue 1 - Issue of repeat Technical Variance 11595R (TR Stow Switch)
  • Rolls-Royce SB-BR 700-78-101529

Quick Links:

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 ]
Thrust Reverser Safety Precautions AMM 78-30-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Deactivation of the Thrust Reverser (for Maintenance) AMM 78-30-00-040-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Activation of the Thrust Reverser (for Maintenance) AMM 78-30-00-440-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Visual Check of the Thrust Reverser System AMM 78-30-00-210-807 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Manual Opening of the Pivoting Doors AMM 78-31-01-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Manual Closing of the Pivoting Doors AMM 78-31-01-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Eng Electronic Controller (EEC)
Mod 73-101559		 EMM 73-21-01-000-801-B00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Eng Electronic Controller (EEC)
Mod 73-101559		 EMM 73-21-01-400-801-B001 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Exhaust Access Panels EMM 78-00-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Exhaust Access Panels EMM 78-00-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Rigging check of the Pivoting Doors EMM 78-31-01-220-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Rigging of the Pivoting Doors EMM 78-31-01-820-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Door Retracted Switch EMM 78-34-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Door Retracted Switch EMM 78-34-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform a visual check of door to include distortion, debris or damage around the TR door.

    1. If damage is found, repair or replace the damage and do close out.
    2. If damage is not found, continue with next step.

  2. Perform a continuity check on the stow switch while the TR door is stowed as follows:

    From To Result
    P7006-1 P7006-2
    P7010-1 P7010-2

    1. If there is no continuity, repair defective wiring as required and do close out.
    2. If there is continuity, continue with next step.

  3. Perform wiring checks between door lower right stow switches and Left EEC as follow:

    From To Result
    P7006-1 P1043-40
    P7006-2 P1043-39
    P7010-1 P1046-40
    P7010-2 P1046-39

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

  4. Perform a visual inspection of the interface wiring and connectors.

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

  5. Swap door stow switch.

    1. If the system checks are good, replace defective door stow switch and do close out.
    2. If fault remains, continue with next step.

  6. Replace the Left EEC.
  7. Do close out.

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