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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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03/30/21

Message Overview:

Message Name:

BLOCK FAULT - BAD INPUTS
(Service Message)

Message Code:

B3-413234

Associated CAS:

None

Reporting LRU: TCAS CH B
System Description: 34-43-00
Schematic Diagram: 34-43-00
Wiring Diagram: 34-43-01

Message Description:

DATA from RIU, L-GP-1, OR MFD is missing or LRUs are off. These issues need to be corrected before TDR faults can be considered valid.

Possible Causes:

  • Input/Output Concentrator 1 (IOC) (A4-IOC)
  • Adaptable Flight Display - Primary 1 (PFD) (A27)
  • Adaptable Flight Display - Primary 2 (PFD) (A26)
  • Adaptable Flight Display - Multi-Function 1 (MFD) (A29)
  • Adaptable Flight Display - Multi-Function 2 (MFD) (A28)
  • Radio Interface Unit 1 (RIU) (A17)
  • Radio Interface Unit 2 (RIU) (A18)
  • Traffic Alert and Collision-Avoidance System (TCAS) (A5)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 7
  2. Comp Id = A005
  3. {Term Definitions}

    1. IOC2-1 2X 350 10 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN;
    2. IOC1-1 1X 350 01 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 1X IN;
    3. MFD1-1 1X 350 NA ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 1X IN;
    4. MFD2-1 2X 350 NA ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN;
    5. RIU1-1 1X 350 01 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 1X IN;
    6. RIU2-1 2X 350 10 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN
    7. RIU1-26 1X 351 01 EXCT XXXX-XXXX XXXX-TXXX XXXX-XXXX 351: 20;NO L-GP-1 INPU
    8. RIU2-26 2X 351 10 EXCT XXXX-XXXX XXXX-TXXX XXXX-XXXX 351: 20;R-GPBUS INACTIVE
    9. PFD2-36 2X 351 NA EXCT XXXX-TXXX XXXX-XXXX XXXX-XXXX 351: 28;NO RB-RIU-6 INPUT
    10. PFD1-35 1X 351 NA EXCT XXXX-XTXX XXXX-XXXX XXXX-XXXX 351: 27;NO LB-RIU-6 INPUT

Quick Links:

Removal of the Radio Interface Unit (RIU) AMM 23-51-21-000-801
Installation of the Radio Interface Unit (RIU) AMM 23-51-21-400-801
Removal of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-000-801
Installation of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-400-801
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 Adaptive Flight-Display Unit AMM 31-61-01-000-801
Installation of the Adaptive Flight-Display Unit AMM 31-61-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. DATA from RIU, L-GP-1, OR MFD is missing or LRUs are off. These issues need to be corrected before TDR faults can be considered valid.

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