09/10/24
Message Overview:
Message Name:
Variable Frequency Generator (VFG) Bearing Failure
| Identifier: | 242OBS005 |
| Effectivity: | ALL |
| System: | ELECTRICAL POWER |
| ASSOCIATED CAS: | NONE |
| System Description: | 24-21-00 - Primary AC Power Supply System |
| Schematic Diagram: | [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-01-1_001 - Primary AC Power |
| Wiring Diagram: | [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-01-1_001 Sheet 1 - Generator Control No. 1 - [ ALL ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-02-1_001 Sheet 1 - Generator Control No. 2 - [ ALL ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-03-1_001 Sheet 1 - Generator Control No. 3 - [ ALL ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-04-1_001 Sheet 1 - Generator Control No. 4 - [ ALL ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-1_001 Sheet 1 - Generator Control No. 1 - [ 9004-9010 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-1_002 Sheet 2 - Generator Control No. 2 - [ 9004-9010 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-1_003 Sheet 3 - Generator Control No. 3 - [ 9004-9010 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-1_004 Sheet 4 - Generator Control No. 4 - [ 9004-9010 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-2_001 Sheet 1 - Generator Control No. 1 - [ 9011-9014 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-2_002 Sheet 2 - Generator Control No. 2 - [ 9011-9014 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-2_003 Sheet 3 - Generator Control No. 3 - [ 9011-9014 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-2_004 Sheet 4 - Generator Control No. 4 - [ 9011-9014 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-4_001 Sheet 1 - Generator Control No. 1 - [ 9002 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-4_002 Sheet 2 - Generator Control No. 2 - [ 9002 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-4_003 Sheet 3 - Generator Control No. 3 - [ 9002 ] [ G5000 ] [ Global Express ] [ Global XRS ] 24-21-00-4_004 Sheet 4 - Generator Control No. 4 - [ 9002 ] |
Message Description:
VFG has cracked oil sight glass, and/or VFG Oil filter bypass tripped and/or metallic contamination in oil lines and/or breached housing
Possible Causes:
- Variable Frequency Generator (VFG) 1
- Variable Frequency Generator (VFG) 2
- Variable Frequency Generator (VFG) 3
- Variable Frequency Generator (VFG) 4
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM): None
NOTES:
- RIL GX-0198 - Return to service following VFG bearing failure and/or VFG housing rupture
Quick Links:
| Grounding of the Aircraft | [ G5000 ] [ Global Express ] [ Global XRS ] AMM10-11-00-867-801 |
| Standard Aircraft Configuration for Maintenance | [ G5000 ] [ Global Express ] [ Global XRS ] AMM12-00-00-867-801 |
| Connect Electrical Power to the Aircraft | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-861-801 |
| Remove the Electrical Power from the Aircraft | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-861-802 |
| Electrical/Electronic Safety Precautions | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-910-801 |
| Electrostatic Discharge Safety Precautions | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-910-802 |
| Removal of the Variable Frequency Generators (VFG) | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-21-01-000-801 |
| Installation of the Variable Frequency Generators (VFG) | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-21-01-400-801 |
| Operational Test of the Variable Frequency Generators (VFG) | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-21-01-710-801 |
| General Visual Inspection of the Variable Frequency Generator (VFG) Oil Tubes | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-21-01-210-801 |
| Access to Active Faults | [ G5000 ] [ Global Express ] [ Global XRS ] AMM45-45-00-970-802 |
Troubleshooting Recommendations:
- Verify OMS for the following fault codes:
2421126LPS - GEN1 OIL OVERTEMP FAULT
2422126LPS - GEN2 OIL OVERTEMP FAULT
2423126LPS - GEN3 OIL OVERTEMP FAULT
2424126LPS - GEN4 OIL OVERTEMP FAULT
2421200LPS - GEN1 DRIVE SHAFT FAIL/INVALID % N2
2422200LPS - GEN2 DRIVE SHAFT FAIL/INVALID % N2
2423200LPS - GEN3 DRIVE SHAFT FAIL/INVALID % N2
2424200LPS - GEN4 DRIVE SHAFT FAIL/INVALID % N2
2421124LPS - GEN1 [DIFF PROTECTION FEEDER]
2422124LPS - GEN2 [DIFF PROTECTION FEEDER]
2423124LPS - GEN3 [DIFF PROTECTION FEEDER]
2424124LPS - GEN4 [DIFF PROTECTION FEEDER] - Combination of the above faults combined with the VFG oil filter bypass indicator tripped, and /or metal particles in the oil lines, and /or VFG end frame cracked or breached, and/or oil sight glass cracked are indications that the VFG bearing may have failed and the recommended RTS is to accomplish RIL GX-0198.