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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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07/23/19

Message Overview:

Fault Message:

PITOT-STATIC STBY HEATER / WRG

Fault Code:

3031108HBM

Associated CAS:

STBY PITOT HT FAIL
(Caution)

Reporting LRU: Heater/Brake Temperature Monitor Unit (HMBU) 2
System Description: 30-31-00
Schematic Diagram: 30-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 30-31-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The STBY PITOT STATIC Probe Heater(s) circuit has been detected opened by Heater/Brake Temperature Monitor Unit (HBMU) 2.

Possible Causes:

  • Standby Pitot/Static Probe Heater
  • Heater/Brake Temperature Monitor Unit (HMBU) 2 (A93)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Heater/Brake-Temperature Monitoring Unit (HBMU) AMM 30-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Heater/Brake-Temperature Monitoring Unit (HBMU) AMM 30-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Pitot-Static Probes AMM 34-11-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Pitot-Static Probes AMM 34-11-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform wiring checks between HBMU 2 and standby pitot static probe heater.

    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.

  2. Measure the resistance of pitot standby static probe heater.
    STBY PITOT-STATIC head heater should be 20 ohms ±10 ohms at ambient temperature.
    STBY PITOT-STATIC probe base heater should be 210 ohms approximately.

    1. If resistance is within range, go to step 4.
    2. If resistance is out of range, continue with next step.

  3. Replace standby pitot static probe heater.

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

  4. Replace HBMU 2.
  5. Do close out.

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