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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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03/10/21

Message Overview:

Message Name:

PTU ENABLE PTU NO LOAD

Message Code:

B3-006655

Associated CAS:

None

Reporting LRU: PTU; PTU ENABLE
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 29-11-01
32-61-09

Message Description:

Proximity Sensor Electronic Unit detects that the discrete output to the Power Transfer Unit (PTU) is not connected to the user interface.

Possible Causes:

  • Hydraulic Control Panel (PL11)
  • Power Transfer Unit (PTU) Select Valve (MT115)
  • Proximity Sensor-Electronic Unit (A9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the HYDRAULIC Control Panel AMM 29-11-01-000-801
Installation of the HYDRAULIC Control Panel AMM 29-11-01-400-801
Operational Test of the HYDRAULIC Control Panel AMM 29-11-01-710-801
Functional Test of the Power Transfer Unit (PTU) AMM 29-12-57-720-801
Removal of the PTU Solenoid AMM 29-12-61-000-801
Installation of the PTU Solenoid AMM 29-12-61-400-801
Removal of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-000-801
Installation of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-400-801
Functional Test of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-720-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do wiring check from the Hydraulic Control Panel connector PL11P2 Pin 20 to the PSEU connector A9AP1 Pin 7K. Repair as required.

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

  2. Do wiring check from the Hydraulic Control Panel connector PL11P2 Pin 20 to the PTU Solenoid connector MT115P1 Pin B. Repair as required.

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

  3. Replace the Hydraulic Control Panel.

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

  4. Replace the PTU Solenoid MT115.

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

  5. Replace the PSEU.
  6. Do close out.

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