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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE 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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06/22/19

Message Overview:

Fault Message:

MACH TRANSDUCER/WRG/SPC CH B

Fault Code:

2731204STL

Associated CAS:

MACH XDUCER FAULT
(Advisory)

Reporting LRU: Stall Protection Computer (SPC)
System Description: 27-32-00
Schematic Diagram: 27-32-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 27-32-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

When Channel B of the Stall Protection Computer (SPC) senses a Mach Transducer failure - one of the faults that follow occurs:

  • The Mach Transducer sends a failure report to the channel B of the SPC through a discrete ARINC label
    • OR,
  • Channel B of the SPC does not receive the Mach ARINC airspeed, altitude or mach number data

Possible Causes:

  • Mach Transducer (MT80)
  • Stall Protection Computer (SPC) (A40)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-27-0363 - No Fault Found initiative: Stall Protection Computer

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Stall Protection Computer AMM 27-32-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Stall Protection Computer AMM 27-32-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Mach Transducer AMM 27-32-13-000-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Mach Transducer AMM 27-32-13-400-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Replace Mach Transducer.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  2. Perform wiring checks between Mach Transducer and SPC.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  3. Replace Stall Protection Computer (SPC).
  4. Do close out.

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