02/02/21
Message Overview
Message Name:
CH A FAULT
(Service Message)
Message Code:
B3-006469
Associated CAS:
| Reporting LRU: | CKPT VENT T SNSR |
| System Description: | 21-61-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
The channel A of the COCKPIT VENTILATED TEMPERATURE SENSOR is detected failed.
Possible Causes:
- Integrated Air System Controller #1 (IASC) (A55)
- Cockpit Ventilated Temperature Sensor - Channel A (MT37)
- 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
- {Term Definitions}
- IAS1A-58 XX 353 00 EXCT XXXX-XXXX TXXX-XXXX XXXX-XXXX 353A: 24; COCKPIT VENTILATED SNSR
- IAS2A-63 XX 353 10 EXCT XXXX-XXXX TXXX-XXXX XXXX-XXXX 353A: 24; COCKPIT VENTILATED SNSR
- Equ Note = Changed v4.2 to reduce nuisance fails with Eq#1.
Quick Links:
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Repair Wiring | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Check the sensor or the wiring to the sensor and the IASC #1.