01/29/21
Message Overview:
Message Description:
The channel B of the CABIN VENTILATED TEMPERATURE SENSOR is detected failed.
Possible Causes:
- Cabin Ventilated Temperature Sensor (MT28)
- Integrated Air System Controller 2 (IASC 2) (A56)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 3
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- Timer = 7
- Logic = IAS2A-62 AND NOT IAS1A-57
- {Term Definitions}
- IAS2A-62 XX 353 10 EXCT XXXX-XXXX XTXX-XXXX XXXX-XXXX 353A:23; CABIN VENTILATED SNSR B
- IAS1A-57 XX 353 00 EXCT XXXX-XXXX XTXX-XXXX XXXX-XXXX 353A:23; CABIN VENTILATED SNSR A
Quick Links:
| 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 |
| Removal of the Cabin Ventilated Temperature-Sensor | AMM 21-61-21-000-801 |
| Installation of the Cabin Ventilated Temperature-Sensor | AMM 21-61-21-400-801 |
| 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:
- Check the sensor or the wiring to the sensor and the IASC #2.