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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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03/16/21

Message Overview:

Message Name:

DEGRADED ARINC A INPUT

Message Code:

B3-007658

Associated CAS:

PROX SYS FAULT
(Advisory)

Reporting LRU: PSEU LRU
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 32-61-12

Message Description:

Proximity Sensor Electronic Unit Channel A is missing expected ARINC input labels.

Possible Causes:

  • Proximity-Sensor Electronic Unit (PSEU) (A9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-34-0189 - Pro Line 21 Advanced Avionics Nuisance Messages and FMS-6200 Issues (20501 - 20999)

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Data Concentrator Unit (DCU) AMM 31-41-01-000-802
Installation of the Data Concentrator Unit (DCU) AMM 31-41-01-400-802
Removal of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-000-801
Installation of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-400-801
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. Review AW300-34-0189 for any nuisance messages.
  2. Pull and reset the PSEU gear system breakers CB1-C13, CB1-C14,CB2-C13, CB2-C14, recheck the system for the fault.

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

  3. Reset the circuit breakers L IAPS CB CB1-B6, then look for other failures related to the Input/Output Concentrators, swap the IOCs.

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

  4. Swap the IOCs.

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

  5. Replace the DCU.

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

  6. Replace the PSEU.
  7. Functional test the PSEU.

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