09/28/19
Message Overview:
Fault Message:
L N2 SPEED WRG/PROBE SHARED RNG MA
Fault Code:
7327327LBR
Associated CAS:
| Reporting LRU: | Left Engine Electronic Controller (EEC) |
| System Description: | 77-30-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | 71-50-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The fault message is set when the Engine Electronic Controller (EEC) senses that the signal from the shared N2 Speed Probe is out-of-limits. During engine operation the Speed Probe circuits are continuously monitored by the Full-Authority Digital Engine-Controller (FADEC).
Possible Causes:
- N2 Speed Probe
- Left Engine Electronic Controller (EEC)
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Engine Safety Precautions | AMM 71-00-00-910-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Opening of the Cowls | AMM 71-10-00-010-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Closing of the Cowls | AMM 71-10-00-410-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Deactivation of the Thrust Reverser (for Maintenance) | AMM 78-30-00-040-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Activation of the Thrust Reverser (for Maintenance) | AMM 78-30-00-440-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the N2 Speed Probes | EMM 77-12-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the N2 Speed Probes | EMM 77-12-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Open the following circuit breakers:
SYSTEM NAME CIRCUIT BREAKER NAME BUS NAME ENGINE L ENG FUEL HPSOV BATT ENGINE L ENG IGN 1 BATT ENGINE L ENG IGN 2 BATT ENGINE L ENG START A BATT ENGINE L ENG START B BATT ENGINE L FADEC CH A BATT ENGINE L FADEC CH B BATT - Perform a deactivation of the thrust reverser.
- Open the cowls.
- Perform a visual inspection of the interface wiring, terminals and connectors for damage between the EEC connector (P1046) and N2 speed probe shared connector (P1073).
- If there is a damage, repair or replace the defective interface wiring and do close out.
- If there is no damage, continue with next step.
- Monitor the system to see if the fault message occurs again.
- If the fault message occurs again, troubleshoot it first and continue with next step.
- If the fault message does not occurs again, continue with next step.
- Close the cowls.
- Perform the activation of the thrust reverser.
- Close the following circuit breakers:
SYSTEM NAME CIRCUIT BREAKER NAME BUS NAME ENGINE L ENG FUEL HPSOV BATT ENGINE L ENG IGN 1 BATT ENGINE L ENG IGN 2 BATT ENGINE L ENG START A BATT ENGINE L ENG START B BATT ENGINE L FADEC CH A BATT ENGINE L FADEC CH B BATT - Check If the maintenance alert message is active.
- If the maintenance alert message is not active, do close out.
- If the maintenance alert message is active, continue with next step.
- Replace N2 Speed Probe.
- Do close out.
