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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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For AOG assistance contact:

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Quick Links

04/27/21

Message Overview:

Message Name:

ENGINE DOES NOT ROTATE ON START

Identifier: 801OBS001
Effectivity: Aircraft 20501 - 20999
System: Engine Starting
System Description: 80-00-00
Schematic Diagram: 80-11-00
Wiring Diagram: 80-11-01

Message description:

The left or right engine does not rotate when engine start is initialized.

Possible Causes:

  • Air Turbine Starter (ATS)
  • Left ATS Control Valve (V13)
  • Right ATS Control Valve (V12)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Prepare for Engine Operation AMM 71-00-00-866-802
Pre-Start Checks AMM 71-00-00-866-804
Start the Engine AMM 71-00-00-866-807
Engine Shutdown Check AMM 71-00-00-866-810
Engine Post-Operation Check AMM 71-00-00-866-811
Removal of the Chip Detector AMM 79-21-09-000-801
Installation of the Chip Detector AMM 79-21-09-400-801
Engine Starting System - Component Location AMM 80-11-00-992-801
Removal of the Air Turbine Starter AMM 80-11-01-000-801
Installation of the Air Turbine Starter AMM 80-11-01-400-801
Starter-Control-Valve Manual-Override Procedure AMM 80-11-05-860-801
Removal of the Starter Control Valve AMM 80-11-05-000-801
Installation of the Starter Control Valve AMM 80-11-05-400-801
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Can the Air Turbine Starter be heard?

    1. If YES, continue with next step.
    2. If NO, perform the L STARTER FAIL (caution) or R STARTER FAIL (caution) troubleshooting tasks depending on the affected side.

  2. Access and inspect the affected engine accessory gearbox oil chip detector.

    1. If metallic debris are present, inspect the ATS for sheared or disengaged shaft.
    2. If no debris are present, continue with next step.

  3. Make sure the ATS Control Valve opens fully when a start is initialized.

    1. If the ATS control valve does not open fully, replace the valve and do close out.
    2. If the valve opens fully, continue with next step.

  4. Replace the ATS.
    NOTE: You may swap the left ATS with the right ATS to confirm faulty unit.
  5. Do close out.
    30_chip_detection

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