02/23/21
Message Overview:
Message Name:
TOP/PORT BSU
Message Code:
B3-007981
Associated CAS:
| Reporting LRU: | SAT 2X00 |
| System Description: | 23-15-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
Fault Triggered by one of: SSM of Top/port BSU Maint Wd indicates Fail Warn, BSU bit of Top/Port BSU Maint Wd indicates T/P BSU fault and SSM of BSU Wd not in Test, BSU SSM shows Self-test after 4 Min after initiating.
Possible Causes:
- Sign Status Matrix (SSM)
- Beam Steering Unit (BSU)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- LRU = SRT1 SAT 2000
- ATA Chapter = 23-00
- Message# = 6
- Comp Id = A082
- Message = TOP/PORT BSU
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- Message Type = Fault Message
- CAS/Cockpit =
- {Term Definitions}
- SRT1-4 XX 350 00 EXCT XXXX-XXXX XXXX-XTXX XXXX-XXXX 350: 19;TOP/PORT BSU
- Equ Descr = Fault Triggered by one of : SSM of Top/port BSU Maint Wd indicates Fail Warn, BSU bit of Top/Port Bsu Maint Wd indicates T/p BSU fault and SSM of BSU Wd not in Test, BSU SSM shows Self Test after 4 Min after initiating.
- Equ ID# = B3-007981
Quick Links:
| 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:
- Fault Triggered by one of: SSM of Top/port BSU Maint Wd indicates Fail Warn, BSU bit of Top/Port BSU Maint Wd indicates T/P BSU fault and SSM of BSU Wd not in Test, BSU SSM shows Self-test after 4 Min after initiating.