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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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12/11/24

Message Overview:

Message Name:

A/T 2 TQA FAULT

Message Code:

2230001AT2

Associated CAS:

A/T 2 FAIL
(Advisory)

Reporting LRU: Integrated Avionics Computer (IAC) 1
Integrated Avionics Computer (IAC) 2
Integrated Avionics Computer (IAC) 3
System Description: 22-30-00 - Autothrottle
Schematic Diagram: 76-30-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 76-10-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The armed Autothrottle (A/T) 2 has a fault.

Possible Causes:

  • Throttle Quadrant (AP41)
  • Auto-Throttle (A/T) Hardware
  • Integrated Avionics Computer (IAC) 1 (A11)
  • Integrated Avionics Computer (IAC) 2 (A10)
  • Integrated Avionics Computer (IAC) 3 (A12)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

Quick Links:

Standard Aircraft Configuration for Maintenance [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM12-00-00-867-801
Electrical/Electronic Safety Precautions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-910-801
Electrostatic Discharge Safety Precautions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-910-802
Removal of the Junction Box JB3 Circuit-Cards [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-02-000-801
Installation of the Junction Box JB3 Circuit-Cards [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-02-400-801
Operational Test of the Junction Box JB3 Circuit-Card 1 [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-02-710-801
Removal of the Junction Box JB4 Circuit-Cards [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-06-000-801
Installation of the Junction Box JB4 Circuit-Cards [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-06-400-801
Operational Test of Junction Box JB4 Circuit-Card 5 [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-06-710-805
Operational Test of the Integrated Avionics Computer (IAC) System [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM31-41-00-710-801
CAIMS Test of the Integrated Avionics Computer (IAC) System [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM31-41-00-740-802
Removal of the Integrated Avionics Computers (IAC) [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM31-41-01-000-801
Installation of the Integrated Avionics Computers (IAC) [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM31-41-01-400-801
CAIMS PMAT General Instructions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-801
Access to Active Faults [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-802
Access to Stored Faults [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM45-45-00-970-803
Removal of the Throttle Quadrant [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM76-10-01-000-801
Installation of the Throttle Quadrant [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM76-10-01-400-801
Operational Test of the Throttle Quadrant [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM76-10-01-710-801

Troubleshooting Recommendations:

  1. Compare the active fault recorded with the active faults in the table that follows:

    NAME OF DISPLAY UNIT ACTIVE FAULT TEST
    CAIMS PMAT A/T 2 TQA FAULT ATA 34 - IAC (FMS) - Auto-throttle Test, A/T TQA Wraparound TEST
    CAIMS PMAT FWC 2 - EXTERNAL ASCB FAULT ATA 31 IAC (FWC2) - ASCB System TEST, IAC EDS/Core Test

  2. Get access to system diagnostics on the CAIMS PMAT and do the test for the applicable active fault. After each test is completed, check the TEST RESULTS page and record the fault type and code for each IMT fault.
  3. Get access to the IMT fault code look-up, and perform the troubleshooting procedures associated to the code.
  4. Is the fault present?

    1. If YES, continue with the next step.
    2. If NO, do the close out.

  5. Interchange IAC 2 (A10) with IAC 1 (A11).
  6. Does the fault remaining posted?

    1. If YES, continue with the next step.
    2. If NO, replace IAC 2 (A10) and do the close out.

  7. Do the wiring continuity check as follow:

    From To Expected Result Result
    TQA (AP41) AP41P4-6 IAC 2 (A10) A10CP1-102 continuity
    TQA (AP41) AP41P4-5 IAC 2 (A10) A11BP1-85 continuity
    TQA (AP41) AP41P4-4 IAC 2 (A10) A12BP1-29 continuity
    TQA (AP41) AP41P4-3 IAC 2 (A10) A12BP1-28 continuity

  8. Is the wiring check good?

    1. If YES, continue with the next step.
    2. If NO, repair or replace as required.

  9. Replace the TQA (AP41).
  10. Do close out.

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