01/29/21
Message Overview:
Message Description:
The AVIONICS VALVE is detected failed in closed position.
Possible Causes:
- Avionics Cooling Valve (MPE14)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- LRU = AVLV AVIONICS VALVE
- ATA Chapter = 21-61
- Message# = 1
- Comp Id = MPE14
- Message = DISAGREE / VALVE CLOSED
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- Message Type = Fault Message
- CAS/Cockpit = EQPT RACK COOL FAULT (advisory)
- Timer = 5
- Logic = IAS1A-41 OR IAS2A-102
- {Term Definitions}
- IAS1A-41 XX 352 00 EXCT XXXX-XXXX XXTX-XXXX XXXX-XXXX 352A:22; AVIONICS VLV FAIL / CLO
- IAS2A-102 XX 352 10 EXCT XXXX-XXXX XXTX-XXXX XXXX-XXXX 352A:22;AVIONICS VLV FAIL/CLOSED
- Equ Note = None
- MCID = None
- LMMT = None
- Equ Descr = The AVIONICS VALVE is detected failed in closed position. Check the valve or the valve position switch or the wiring to the valve.
Quick Links:
| Removal of the Avionics Cooling Valve | AMM 21-23-09-000-801 |
| Installation of the Avionics Cooling Valve | AMM 21-23-09-400-801 |
| Deactivation of the Avionics Cooling Valve (for Maintenance) | AMM 21-23-09-040-801 |
| Activation of the Avionics Cooling Valve (for Maintenance) | AMM 21-23-09-440-801 |
| 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:
- Check the valve or the valve position switch or the wiring to the valve.