02/23/21
Message Overview:
Message Name:
NO RB-RIU-9 BUS OUTPUT
Message Code:
B3-007824
Associated CAS:
| Reporting LRU: | RIU 2 |
| System Description: | 23-00-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
RB-RIU-9 bus absent at L-CDU, L-PFD, L-MFD.
Possible Causes:
- Right Radio Interface Unit (RIU) (A18)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 18
- Comp Id = A018
- Fault Logged = AIR, TAXI
- Status = FAILED/WIRING
- {Term Definitions}
- CDU1-6 1X 350 01 EXCT XXXX-XXXX XXXX-XXXX XTXX-XXXX 350: 15; NO RB-RIU-9 I
- PFD1-36 1X 351 NA EXCT XXXX-TXXX XXXX-XXXX XXXX-XXXX 351: 28; NO RB-RIU-9 INPUT
- MFD1-36 1X 351 NA EXCT XXXX-TXXX XXXX-XXXX XXXX-XXXX 351: 28; NO RB-RIU-9 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 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
| Electrical Connectors - Maintenance Practice - ALL | SPM 20-20-00-02 |
Troubleshooting Recommendations:
- Suspect failed R-RIU output or wiring.