02/02/21
Message Overview:
Message Name:
NO IASC-1B BUS INPUT
Message Code:
B3-006919
Associated CAS:
| Reporting LRU: | IASC2 TST A |
| System Description: | 21-61-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
The channel B of the IASC-2 does not receive any data from the opposite IASC-1 channel B, but the IASC-1 channel A does receive data.
Possible Causes:
- Integrated Air System Controller (IASC1) (A55)
- Integrated Air System Controller (IASC2) (A56)
- Junction Box 1 (JB1)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 10
- Fault Logged = AIR, TAXI
- Status = FAILED/WIRING
- Message Type = Fault Message
- {Term Definitions}
- IAS2A-100 XX 354 11 EXCT XXXX-XXXX XXXX-XTXX XXXX-XXXX 354B: 19; NO IASC-1 CHANNEL B BUS
- IAS1A-86 XX 354 00 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 354A: 18; NO IASC-1 CHANNEL B BUS
Quick Links:
| Operational Test of the Cabin Pressure Control System | AMM 21-31-00-710-801 |
| Removal of the Integrated Air System (IAS) Controller | AMM 21-31-01-000-801 |
| Installation of the Integrated Air System (IAS) Controller | AMM 21-31-01-400-801 |
| Operational Test of the Integrated Air System (IAS) Controller | AMM 21-31-01-710-801 |
| Removal of the Junction Box JB1 | AMM 24-63-01-000-802 |
| Installation of the Junction Box JB1 | AMM 24-63-01-400-802 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Wire Repair | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- The channel B of the IASC-2 does not receive any data from the opposite IASC-1 channel B, but the IASC-1 channel A does receive data. Check wiring.