12/19/22
Message Overview:
Message Name:
SATELLITE DATA UNIT
Message Code:
B3-007978
Associated CAS:
| Reporting LRU: | SAT 2X00 |
| System Description: | 23-15-00 |
| Schematic Diagram: | 23-15-00-101 - SATELLITE COMMUNICATION |
| Wiring Diagram: | 23-15-01-1 - SATCOM Satellite Data Unit (SDU) |
Message Description:
One of the following problems exist: Internal Fail, Mod Synth Lock, RFU RX or HPA TX Gain, HSR, HPA, Secure ORT invalid, TX gain, or RFU TX Gain failure.
Possible Causes:
- Satellite Data Unit (SDU) (A82)
- Owner Requirements Table (ORT)
- LNA Duplexer (A83)
- Satcom Antenna (E24)
- 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
- {Term Definitions}
- SRT1-1 XX 350 00 EXCT XXXX-XXXX XXXX-XXXX XXXX-XTXX 350: 11;SDU INTERNAL FAULT
- SRT1-6 XX 350 00 EXCT XXXX-XXXX XXXT-XXXX XXXX-XXXX 350: 21;INTER GAIN OR T/P ANTENNA
- SRT1-7 XX 350 00 EXCT XXXX-XXXX XXTX-XXXX XXXX-XXXX 350: 22;STARBOARD HI G ANT
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:
- One of the following problems exist: Internal Fail, Mod Synth Lock, RFU RX or HPA TX Gain, HSR, HPA, Secure ORT invalid, TX gain, or RFU_TX_Gain failure.