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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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Quick Links

06/24/19

Message Overview:

Fault Message:

MACH TRANSDUCER/WRG/SPC CH A I/F

Fault Code:

2730105STL

Associated CAS:

None

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 airspeed, altitude or mach speed difference between the Mach Transducer and the Micro Air Data Computer (MADC) is greater then 25 kts, 1000 feets or 0.005 Mach. It could also be related to a defective ARINC 429 signal from the Mach Transducer to the Stall Protection Computer Channel A.

NOTE: On the aircraft s/n 9158 and subs, this message is a nuisance because the Mach Transducer function is included in the Integrated Electronics Standby Instrument (IESI). On the ground with the a/c static, the default speed for the MADC is 30 kts and for the IESI is 0 kts.

Possible Causes:

  • Mach Transducer (MT80)
  • Integrated Electronics Standby Instrument (IESI)
  • Stall Protection Computer (SPC) (A40)
  • Stall Protection Computer (SPC) Channel A
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

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 ]
Removal of Integrated Electronic Standby Instrument AMM 34-12-03-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of Integrated Electronic Standby Instrument AMM 34-12-03-400-801 [ 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/Integrated Electronic Standby Instrument.

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

  2. Perform wiring checks between Mach Transducer/Integrated Electronic Standby Instrument 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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