02/03/21
Message Overview:
Message Name:
CH B FAULT
(Service Message)
Message Code:
B3-007662
Associated CAS:
| Reporting LRU: | PACK TEMP SNSR |
| System Description: | 21-61-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
The channel B of the PACK TEMPERATURE SENSOR is detected failed.
Possible Causes:
- Pack Temperature Sensor (MT31)
- Integrated Air System Controller #2 (IASC) (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
- Message Type = Service Message
- {Term Definitions}
- IAS2A-56 XX 353 10 EXCT XXXX-XXXX XXXX-XXXX TXXX-XXXX 353A: 16; PACK TEMP SNSR B FAIL
- IAS1A-51 XX 353 00 EXCT XXXX-XXXX XXXX-XXXX TXXX-XXXX 353A: 16; PACK TEMP SNSR A FAIL
Quick Links:
| Removal of the Pack Temperature Sensor | AMM 21-52-25-000-801 |
| Installation of the Pack Temperature Sensor | AMM 21-52-25-400-801 |
| 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:
- The channel B of the PACK TEMPERATURE SENSOR is detected failed. Check the sensor or the wiring to the sensor and the IASC #2.