08/13/19
Message Overview:
Fault Message:
HYD 3 OVERFILLED
Fault Code:
0000H3OF
Associated CAS:
| Reporting LRU: | Hydraulic System 3 |
| System Description: | 29-13-00 |
| Schematic Diagram: | 29-13-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 29-00-05 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
With the Hydraulic System 3 pressurized, the Reservoir Quantity is above the acceptable limits. (Insufficient room for the landing gear retracted Hydraulic Fluid) (See the correlation table below for Hydraulic Quantity message trigger limits):
| HYDRAULIC FLUID TEMPERATURE | QUANTITY |
|---|---|
| ≥-40°C to ≤-17°C | <33% |
| -16°C to ≤4°C | <40% |
| 5°C to ≤26°C | <47% |
| 27°C to ≤49°C | <54% |
| 50°C to ≤71°C | <62% |
| 72°C to ≤93°C | <69% |
| Aircraft Condition: Weight on Wheels, system pressurized above 2600 psi. | |
Possible Causes:
- Data Acquisition Unit (DAU) 3 (A30)
- Hydraulic System 3 Reservoir Quantity Transducer (MT145)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- 700T-0022 - Hydraulic System - Fluid Transfer
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Bleeding of the No. 3 Hydraulic System | AMM 29-10-00-870-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 3 Hydraulic System Reservoir | AMM 29-13-29-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 3 Hydraulic System Reservoir | AMM 29-13-29-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Data Acquisition Units (DAU) | AMM 31-42-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Data Acquisition Units (DAU) | AMM 31-42-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Carry out visual check of the hydraulic system quantity.
- If visual quantity shows an overfill condition, correctly service system and confirm fault is no longer present and do close out.
- If fault remains, continue with next step.
- Swap DAU 3 with DAU 1.
- If the hydraulic system 3 quantity checks good, replace DAU 3 and do close out.
- If fault remains, continue with next step.
- Perform wiring checks between hydraulic system 3 reservoir quantity transducer (MT145) and DAU 3.
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Replace Hydraulic System 3 Reservoir Transducer.
- Do close out.
