Lycoming TEO-540-C1A Maintenance Manual page 490

Fault ID 246
Fault
Description
Root Cause
Fault ID 247
Fault Primary -reserved-
Description Secondary: EOT Sensor Range Fault
This fault occurs if the Engineering value of the measured parameter is outside the expected
window defined by the calibratable Highest and Lowest Valid Engineering Values.
Root Cause The Highest and Lowest possible engineering values define the range of values that can be
expected for the entire engine operating envelope. Any value observed outside this envelope is
flagged as a sensor range fault.
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? If
yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. Inspect the sensor, sensor lead and connector. If there is damage found, replace the sensor per the
"Sensor Replacement Procedure" in Chapter 72-70. If there is no damage, go to step 4.
4. Inspect engine harness for visible signs of damage. If damage is found, contact Lycoming Engines. If
no damage is found, go to step 5.
5. Swap the oil temperature sensor with the fuel rail temp sensor (A012) and run the engine. Is there now
an active fuel rail temp sensor range fault? If yes, replace the sensor per the "Sensor Replacement
Procedure" in Chapter 72-70. If no, complete a continuity test of the harness from the harness sensor
connector to the ECU connector using the engine system schematic. If the continuity check fails, isolate
to affected harness by disconnecting the firewall connection, then contact Lycoming Engines. If the
continuity checks good, replace the ECU.
6. If the above steps are unsuccessful, contact Lycoming.
Appendix D
Page 460
Fault Group 31
Troubleshooting Steps
Fault Group 31
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name
-Reserved-
Fault Lamp
[FAULT: engine oil temperature
Fault Name
range]
Fault Lamp
© 2018 Avco Corporation. All Rights Reserved
TLO
TLO
November 2018