02/24/21
Message Overview:
Message Name:
NO L-RIU-11 BUS OUTPUT
Message Code:
B3-446887
Associated CAS:
| Reporting LRU: | RIU 1 DATALINK |
| System Description: | 23-22-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
L-RIU-11 bus absent at L-IOC and L-CDU. L-RIU-12 bus is present at R-IOC.
Possible Causes:
- Left Radio Interface Unit (RIU)-11
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 4
- Comp Id = A017
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- {Term Definitions}
- DLNK-9 1X 350 01 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 1X IN
- CDU1-9 1X 350 01 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 350: 18;NO L-RIU-11 IN RX-2 PIN
- DLNK-10 2X 350 01 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN
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 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Wire Repair | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Suspect failed L-RIU-11 output or wiring.