06/29/21
Message Overview:
Message Name:
HYDRAULIC TEMPERATURE INDICATION INVALID OR INCORRECT
| Message Code: | 293OBS016 |
| Effectivity: | All |
| System: | Engine Indicating |
| System Description: | 29-30-00 |
| Schematic Diagram: | 29-12-00 [ Global Express ] [ G5000 ] [ Global XRS ] 29-13-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 29-00-03 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
A Hydraulic Fluid Temperature Indication that is invalid or incorrect shows on the Hydraulic synoptic Page (HSP) of the Engine Indication and Crew Alerting System (EICAS). These procedures apply to the hydraulic-system temperature indicator 1, 2 and 3. Differences are identified.
Possible Causes:
- Data Acquisition Unit (DAU) 1 (A17)
- Data Acquisition Unit (DAU) 2 (A18)
- Data Acquisition Unit (DAU) 3 (A30)
- Hydraulic System 1 Reservoir Temperature Transducer (MT138)
- Hydraulic System 2 Reservoir Temperature Transducer (MT141)
- Hydraulic System 3 Reservoir Temperature Transducer (MT144)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Connect Electrical Power to the Aircraft | AMM 24-00-00-861-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Remove the Electrical Power from the Aircraft | AMM 24-00-00-861-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| 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 ] |
| Hydraulic Safety Precautions | AMM 29-00-00-910-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Hydraulic Technical Precautions | AMM 29-00-00-910-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic System Reservoirs | AMM 29-12-25-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 1 and No. 2 Hydraulic System Reservoirs | AMM 29-12-25-400-801 [ 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 ] |
| 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 invalid hydraulic-system temperature indications.
- If hydraulic temperature-indication 2 is invalid, go to step 3.
- If hydraulic temperature-indication 3 is invalid, go to step 4.
- If hydraulic temperature-indication 1 is invalid, continue with the next step.
- Disconnect the connector MT138P1 from the hydraulic temperature-transducer 1. Perform a continuity check for open circuits or short circuits between Hydraulic Temperature-Transducer 1 and DAU 1 as follows:
From To Result MT138P1-A A17AP1-J3 MT138P1-B A17AP1-H3 MT138P1-A Ground MT138P1-B Ground - If there is no continuity, repair defective wiring as required and do close out.
- If there is continuity, continue with the next step.
- Perform the troubleshooting for observed fault "Temperature Transducer 1".
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Disconnect the connector MT141P1 from the hydraulic temperature-transducer 2. Perform a continuity check for open circuits or short circuits between Hydraulic Temperature-Transducer 2 and DAU 2 as follows:
From To Result MT141P1-A A18AP1-J3 MT141P1-B A18AP1-H3 MT141P1-A Ground MT141P1-B Ground - If there is no continuity, repair defective wiring as required and do close out.
- If the check is satisfactory, continue with next step.
- Perform the troubleshooting for observed fault "Temperature Transducer 2".
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Disconnect the connector MT144P1 from the hydraulic temperature-transducer 3. Perform a continuity check for open circuits or short circuits between Hydraulic Temperature-Transducer 3 and DAU 3 as follows:
From To Result MT144P1-A A30AP1-J3 MT144P1-B A30AP1-H3 MT144P1-A Ground MT144P1-B Ground - If there is no continuity, repair defective wiring as required and do close out.
- If the check is satisfactory, continue with next step.
- Perform the troubleshooting for observed fault "Temperature transducer 3".
- Do close out.