09/13/19
Message Overview:
Fault Message:
NO PRI DC POWER TO FADEC CONTROLLER
Fault Code:
4960069APU
Associated CAS:
| Reporting LRU: | Full-Authority Digital Engine-Controller (FADEC) |
| System Description: | 49-60-00 |
| Schematic Diagram: | 49-61-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 49-12-01 [ Global Express ] [ G5000 ] [ Global XRS ] 49-61-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The Full-Authority Digital Engine-Controller (FADEC) stopped the Auxiliary Power Unit (APU) or recorded incorrect power inputs because of Primary power to the FADEC is less than seven volts. There was an APU shutdown because of a power loss at the FADEC primary power inputs.
Possible Causes:
- Auxiliary Power Unit (APU) Full-Authority Digital Engine-Controller (FADEC) (A108)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Opening of Non-Thermal Circuit Breakers | AMM 24-00-00-863-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Closing of Non-Thermal Circuit Breakers | AMM 24-00-00-863-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Electrical/Electronic Safety Precautions | AMM 24-00-00-910-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| APU Safety Precautions | AMM 49-00-00-910-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Operational Test of the APU (Loaded) | AMM 49-10-00-710-802 [ 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 ] |
| Open the Auxiliary Power Unit (APU) Access Doors (321BB) |
AMM 52-43-00-010-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Close the Auxiliary Power Unit (APU) Access Doors (321BB) |
AMM 52-43-00-410-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the External Avionics-Compartment Access-Panel (140BB) |
AMM 52-45-11-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the External Avionics-Compartment Access-Panel (140BB) |
AMM 52-45-11-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Safety Precautions - Maintenance Practices - ALL | SPM 20-00-01-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Check the engine branched wiring-harness for bare wiring, kinks, worn areas and other damage.
- If there is a damage, replace the engine branched wiring-harness and do close out.
- If there is no damage, continue with next step.
- Check the aircraft wiring harness for bare wiring, kinks, worn areas and other damage.
- If there is a damage, replace the defective wiring as required and do close out.
- If there is no damage, continue with next step.
- Use the wiring manual to perform wiring checks between the FADEC and Primary DC power source.
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Rerack the APU FADEC making sure it is fully and properly inserted into place. Is the fault still present?
- If NO, do close out.
- If YES, continue with next step.
- Replace the FADEC (A108).
- Do close out.