08/10/21
Message Overview:
Message Name:
DISAGREE / VALVE CLOSED
Message Code:
B3-008139
Associated CAS:
| Reporting LRU: | XBLEED VALVE |
| System Description: | 21-61-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
The CROSS BLEED VALVE is detected failed in closed position.
Possible Causes:
- Cross-Bleed Valve (MPE02)
- Position Switch
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 2
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- Message Type = Fault Message
- {Term Definitions}
- IAS2A-25 XX 351 10 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 351A: 18; XBLEED VALVE FAIL / CLOSED
- IAS1A-22 XX 351 00 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 351A: 18; XBLEED VALVE FAIL / CLOSED
Quick Links:
| Removal of the Cross-Bleed Valve | AMM 36-11-15-000-801 |
| Installation of the Cross-Bleed Valve | AMM 36-11-15-400-801 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Repair Wiring | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- The CROSS BLEED VALVE is detected failed in closed position.
- Check valve or position switch or wiring between the valve, and the IASCs.