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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:

YOKES TILTED IN LEVEL FLIGHT

Identifier: 271OBS001
Effectivity: AIRCRAFT 20501 - 20999
System: Flight Controls
System Description: 27-11-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Both yokes seem tilted to one side, in level flight even with the aileron trim adjusted.

Possible Causes:

  • Aileron Cable tension
  • Aileron system rigging
  • Aileron control surface balancing

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

RIL-BD-0023 Aileron rigging

Quick Links:

Functional Test of the Aileron Cable Tension - Wing Cables (WS35.60 to WS292.00) AMM 27-11-00-720-801
Functional Test of the Aileron Cable Tension - Autopilot, Control Column and Fuselage Cables AMM 27-11-00-720-805
Functional Test of the Aileron Control System - Friction Test AMM 27-11-00-720-806
Rigging of the Aileron Control Cables AMM 27-11-00-820-801
Rigging Check of the Aileron Position Sensor AMM 27-11-13-220-801
Rigging Check of the Aileron Control Surfaces AMM 27-11-17-220-801
Balancing of the Aileron Control Surfaces AMM 27-11-17-820-802
Functional Test of the Aileron Trim System AMM 27-12-00-720-801

Troubleshooting Recommendations:

  1. Perform the Aileron Cable tension check as per AMM tasks AMM 27-11-00-720-801 and AMM 27-11-00-720-805.

    1. If cable tension is found out of tolerance, rectify as required.
    2. If cable tension is good, continue with next step.

  2. Perform the rigging check of the Aileron system as per RIL-BD-0023.

    1. Perform rigging adjustments if required.
    2. If no adjustments are required, continue with next step.

  3. Perform the balancing check of the Aileron control surfaces.
  4. Do close out

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