Lycoming TEO-540-C1A Maintenance Manual page 543

TEO-540-C1A Engine Maintenance Manual
Fault ID 423
Fault
Description
Root Cause
Fault ID 424
Fault Fuel filter pressure drop limit 1
Description exceeded Fault
This fault indicates the fuel filter drop pressure drop has consistently exceeded its
Root Cause maximum allowable threshold. This indicates a minor restricted flow between the fuel
pump outlet pressure and fuel rail pressure
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? If
yes, go to step 2. If no, go to step 4.
2. Are there any active or logged fuel pressure or MAP sensor faults? If yes, go to troubleshooting
procedure for related fault. If no, go to step 3.
3. Remove the engine fuel filter and clean in accordance with Chapter 73-10 of this manual. Reinstall the
filter, run the engine in accordance with the engine and aircraft maintenance manuals.
Is the fault active? If yes, replace the filter. If no, go to step 4.
4. Clear Service faults using the FST by following the steps outlined in the "Access the Field Service
Tool" section in Appendix C or the latest revision of SSP-118.
425
Fault ID
Fault High fuel injector pressure delta fault
Description
This fault indicates the fuel injector pressure delta is consistently above the maximum
Root Cause
allowable threshold
Troubleshooting Steps
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active?
If yes, go to step 2. If no, go to step 6.
2. While engine is running, set aux fuel pump switch to on. Is fault still active? If yes, go to step 3. If
no, go to step 6.
3. Are there any active or logged fuel pressure or MAP sensor faults? If yes, go to troubleshooting
procedure for related fault. If no, go to step 4.
4. Inspect fuel rail, fuel pressure regulator, and fuel manifold return lines for damage or obstructions.
Replace any components that are damaged or obstructed. Run the engine in accordance with the
engine and aircraft maintenance manuals. Is the fault active? If yes, go to step 5. If no, go to step 6.
5. With engine running, using the FST, monitor fuel rail pressure. Is the fuel rail pressure within
specified limits in accordance with Appendix A of the TEO-540-C1A Engine Installation and
Operation Manual? If no, replace the fuel pressure regulator. If yes, contact Lycoming Engines.
6. Clear Service faults using the FST by following the steps outlined in the "Access the Field Service
Tool" section in Appendix C or the latest revision of SSP-118.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 53
Troubleshooting Steps
Fault Group 54
Troubleshooting Steps
Fault Group 54
Fault Name
-Reserved-
Fault Lamp
[FAULT: fuel filter pressure drop
Fault Name
exceeded_1]
Fault Lamp
[FAULT: high fuel injector pressure
Fault Name
delta]
Fault Lamp
TLO
FFL
FFL
Appendix D
Page 513