07/22/19
Message Overview:
Fault Message:
EMS CDU INTERFACE / WRG
Fault Code:
3030520HBM
Associated CAS:
| Reporting LRU: | Heater/Brake-Temperature Monitoring Unit (HBMU) |
| System Description: | 30-31-00 |
| Schematic Diagram: | 30-31-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 30-31-01 [ Global Express ] [ G5000 ] [ Global XRS ] 31-42-05 [ Global Express ] [ G5000 ] [ Global XRS ] 31-42-06 [ Global Express ] [ G5000 ] [ Global XRS ] 32-11-03 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
Heater/Brake-Temperature Monitoring Unit (HBMU) 1 or Heater/Brake-Temperature Monitoring Unit (HBMU) 2 does not receive Label 267 (ADG Status) from Electrical Management System Control andDisplay Units (EMS CDUs) or Labels is invalid.
Possible Causes:
- Data Acquisition Unit (DAU) 1 (A17)
- Data Acquisition Unit (DAU) 2 (A18)
- Electrical Management System Control and Display Unit (EMS CDU) 1 (A94)
- Electrical Management System Control and Display Unit (EMS CDU) 2 (A91)
- Heater/Brake-Temperature Monitoring Unit (HMBU) 1 (A121)
- Heater/Brake-Temperature Monitoring Unit (HMBU) 2 (A93)
- Junction Box 3 (JB3)
- Junction Box 4 (JB4)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Junction Box JB3 | AMM 24-00-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Junction Box JB3 | AMM 24-00-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Junction Box JB4 | AMM 24-00-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Junction Box JB4 | AMM 24-00-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Electrical Management System Control-and-Display Units (EMS CDU) | AMM 24-70-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Electrical Management System Control-and-Display Units (EMS CDU) | AMM 24-70-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Heater/Brake-Temperature Monitoring Unit (HBMU) | AMM 30-31-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Heater/Brake-Temperature Monitoring Unit (HBMU) | AMM 30-31-01-400-801 [ 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:
- Look at the CAIMS stored and active faults. Make sure there is no fault present for DAU 1(2), EMS CDU 1(2).
- Using the Bus Reader, read Label 136 & 162 from EMS CDU 1(2). Make sure the Labels are present and valid.
- Using the Bus Reader, read WSP 61 and WSP 67 dataset 3 from DAU 1 and DAU 2. Make sure the WSPs are present and valid.
- Swap DAU 1 with DAU 3 or DAU 2 with DAU 4.
- If system checks are good, replace DAU 1 or DAU 2 and do close out.
- If fault remains, continue with next step.
- Perform wiring checks of ARINC between DAU 1, JB3 and HBMU 1.
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Perform wiring checks of ARINC between DAU 2, JB4 and HBMU 2.
- 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 HBMU 1.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace HBMU 2.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace JB3.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace JB4.
- Do close out.
