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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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03/28/25

Message Overview:

Message Name:

NO DATA - TIME TOTALIZING METER/WRG

Message Code:

4960325APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-70-00 - Ignition/Starting
Schematic Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] SSM 49-61-00-101 - APU Automatic Control System
Wiring Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] 49-12-01 - Sheet 1 - Harness - ALL
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-12-01 - Sheet 2 - Harness - ALL
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01 - Sheet 1 - Control - 9002-9129
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01 - Sheet 2 - Fadec Interface - 9002-9129
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01-1 - Sheet 1 Control - 9159-9249
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01-1 - Sheet 1 Control - 9250-9431
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01-1 - Sheet 1 Control - 9127-9129
[ Global Express ]  [ G5000 ]  [ Global XRS ] 49-61-01-1 - Sheet 1 Control - 9130-9249

Message Description:

The Full Authority Digital Engine Control (FADEC) cannot read data from the time totalizing meter. This shows a possible defective time totalizing meter or a possible short or open circuit in the engine branched wiring-harness or the aircraft wiring harness.

Possible Causes:

  • Time Totalizing Meter (M1)
  • Full Authority Digital Engine Controller (FADEC) (A108)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Full Throttle Blog/Forum Articles/Infoservice/Newsletter:

  • D201007000037 - Honeywell RE220 APU Line Maintenance Fault Isolation Procedure to Correct Auxiliary Power Unit (APU) Operational Issue Service Information Letter (D201007000037)

Flight Operation Notifications Manual (FONM): None

Quick Links:

APU Safety Precautions AMM 49-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Engine Branched Wiring-Harness AMM 49-12-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Branched Wiring-Harness AMM 49-12-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Full-Authority Digital Engine-Controller (FADEC) AMM 49-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Full-Authority Digital Engine-Controller (FADEC) AMM 49-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Time Totalizing Meter AMM 49-70-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Time Totalizing Meter AMM 49-70-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Examine the engine branched wiring-harness for bare wiring, kinks, worn areas and other damage (WM 49-12).

    1. If there is bare wiring, kinks, worn areas or other damage, replace engine branched wiring-harness and do close out.
    2. If the message NO DATA - TIME TOTALIZING METER/WRG still shows on the CAIMS PMAT, continue with next step.

  2. Examine the time totalizing meter (M1) receptacle for contamination and damage.

    1. If there is contamination or damage, go to step 8.
    2. If the message NO DATA - TIME TOTALIZING METER/WRG still shows on the CAIMS PMAT, continue with next step.

  3. Connect the hour meter/start counter reader to the time totalizing meter (M1). Push down and hold the push-button on the hour meter/start counter reader.

    1. If there is no data on the EVENTS LED, go to step 8.
    2. If the message NO DATA - TIME TOTALIZING METER/WRG still shows on the CAIMS PMAT, continue with next step.

  4. Perform wiring checks between P1 (APU) and M1P1 (time totalizing meter).

    1. If wiring checks are not good, replace the engine branched wiring-harness and do close out.
    2. If wiring checks are good and if the message NO DATA - TIME TOTALIZING METER/WRG still shows on the CAIMS PMAT, continue with next step.

  5. Perform a insulation resistance check between pins of APU connector (P1) and time totalizing meter (M1P1) with shell as follows (WM 49-12):

    From To Expected Result Result
    P1-72 Ground >1 megaohm
    M1P1-C Ground >1 megaohm

    1. If wiring checks are not good, replace engine branched wiring-harness and do close out.
    2. If wiring checks are good and if the message NO DATA - TIME TOTALIZING METER/WRG still shows on the CAIMS PMAT, continue with next step.

  6. Perform a wiring check between aircraft wiring harness connector (J802) and FADEC connector (A108AP1).

    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.

  7. Replace FADEC (A108).

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

  8. Replace Time Totalizing Meter (M1).
  9. Do close out.

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