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Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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CRC Montreal (YUL)
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11/10/23

Message Overview:

Message Name:

SDU STRAPPING PARITY

Message Code:

B3-007986

Associated CAS:

None

Reporting LRU: SAT 2X00
System Description: 23-15-00 - Satellite Communication (SATCOM) System
Schematic Diagram: None
Wiring Diagram: None

Message Description:

The Satellite Receiver/Transmitter (SRT) is calculating an incorrect parity on its rear connector strapping.

Possible Causes:

  • Satellite Communication Data Bus
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-23-0419 - Satcom Data Unit (SDU-2200) Software Upgrade Available

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 11
  2. Comp Id = A082
  3. Fault Logged = AIR, TAXI
  4. Status = FAILED/WIRING
  5. {Term Definitions}

    1. SRT1-9 XX 350 00 EXCT XXXX-XXXT XXXX-XXXX XXXX-XXXX 350: 25;SRT STRAP PARITY

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:

  1. The SRT is calculating an incorrect parity on its rear connector strapping. Also suspect as a possible cause of the failure a failed SATCOM data bus or wiring.
  2. Do close out.
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