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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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04/26/21

Message Overview:

Message Name:

GROUND SPOILERS ACTUATOR LEAKAGE

Identifier: 276OBS001
Effectivity: AIRCRAFT 20501 - 20999
System: Flight Controls
Associated CAS: None
System Description: 27-63-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Hydraulic fluid leaks have been noticed on Ground Spoiler Actuator.

Possible Causes:

  • Actuator Piston Rod Seal exceed the allowable leak rate.

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

We noted that often, more than one actuator was replaced because the troubleshooting performed was not sufficient to identify the faulty actuator.
Do not forget that it is normal to have a wet GSA piston or seal, the seal is design to keep the piston rod lubricated.

Quick Links:

Leak Test of the Ground Spoiler Actuator AMM 27-63-05-790-801

Troubleshooting Recommendations:

  1. Perform the Leak Test of the Ground Spoiler Actuator for each suspected actuator.

    1. If the Leak Test passes, do close out.
    2. If the Leak Test fails, continue with next step.

  2. Replace Ground Spoiler Actuator.
    NOTE: Record the leak rate and all your observation/findings on the following form.
  3. Submit a copy of the completed form to your FSR and attach another copy to the Material Return Authorization (MRA) form.
  4. Do close out.

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