Lycoming TEO-540-C1A Maintenance Manual page 462

Fault ID 147
Fault
Deck Temperature slew rate fault
Description
This fault indicates the temperature sensor slew rate is greater than the calibrated
Root Cause
maximum.
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. Swap the sensor giving the fault with one of the MAT sensors (A035, or A042), and run the engine. Is
there now an active manifold air temperature slew rate fault? If yes, replace the sensor per the "Sensor
Replacement Procedures" section 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.
*NOTE: This fault could be caused by another deck temperature fault. If there are any other active deck
temperature faults, go to troubleshooting steps for the corresponding deck temperature fault.
Fault ID 148
Fault
Fuel rail temperature slew rate fault
Description
This fault indicates the temperature sensor slew rate is greater than the calibrated
Root Cause
maximum.
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. Swap the fuel rail temp sensor with the oil temperature sensor (A026) and run the engine. Is there now
an active oil temperature slew rate fault? If yes, replace the sensor per the "Sensor Replacement
Procedures" section 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.
*NOTE: This fault could be caused by another fuel temperature fault. If there are any other active fuel
temperature faults go to troubleshooting steps for the corresponding fuel temperature fault.
Appendix D
Page 432
Fault Group 19
Troubleshooting Steps
Fault Group 19
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
[FAULT: deck temperature slew
Fault Name
rate]
Fault Lamp
[FAULT: fuel rail temperature slew
Fault Name
rate]
Fault Lamp
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None
None
November 2018