Lycoming TEO-540-C1A Maintenance Manual page 525

TEO-540-C1A Engine Maintenance Manual
Fault ID 344
Fault
Description
Root Cause
Fault ID 345
Fault
Description
Root Cause
Fault ID 346
Fault
TIT over temperature fault
Description
This fault indicates the turbine inlet temperature has exceeded its calibrated maximum
Root Cause threshold. The fault will become inactive if the turbine inlet temperature returns to normal
operation.
1. Are there any active or logged slew rate or range faults on the suspected sensor? If yes, replace the
sensor. If no, go to step 2.
2. Are there any active or logged fuel injector, detonation, fuel filter in the fault history that match the EEC
hours for the TIT fault? If yes, go to troubleshooting procedure for that fault(s). If no, go to step 3.
3. Remove TIT sensor and inspect for physical damage to probe (eg...burnt end), connector or lead. Is
there any damage to sensor? If yes, replace the sensor. If fault becomes inactive, go to step 6. If fault is
still active after changing probe, or no damage to probe was found, go to step 4.
4. Complete a continuity and short circuit test of the engine and engine airframe harnesses from TIT sensor
harness connector to the ECU connector using the engine system schematic. If the continuity or short
circuit check fails, isolate to affected harness by disconnecting the engine harness at the firewall
connector, then contact Lycoming Engines.
5. 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 44
Troubleshooting Steps
Fault Group 44
Troubleshooting Steps
Fault Group 44
Troubleshooting Steps
Fault Name
-Reserved-
Fault Lamp
Fault Name
-Reserved-
Fault Lamp
Fault Name
[FAULT: TIT over temperature]
Fault Lamp
TLO
TLO
TLO
Appendix D
Page 495