Lycoming TEO-540-C1A Maintenance Manual page 465

TEO-540-C1A Engine Maintenance Manual
Fault ID 153
Fault Local compressor inlet pressure slew
Description rate fault
Root Cause This fault indicates the pressure sensor slew rate is greater than the calibrated 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. Inspect sensor, and lines for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors or hoses, burned or broken sensors). If damaged, replace the sensor per the "Sensor
Replacement Procedures" section in Chapter 72-70. If no damage is found, go to step 4.
4. Inspect harness connection for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors). Contact Lycoming if harness damage is found. If no damage found, go to step 5.
5. Swap affected sensor ((A037 or A038) with opposite sensor. Run the engine. Does the fault move with
the sensor? If yes, replace the sensor. If no, go to step 6.
6. 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
sensor. If fault persists, replace the ECU.
*NOTE: This fault could be caused by another compressor inlet air pressure fault. If there are any other
active compressor inlet air pressure faults go to troubleshooting steps for the corresponding
compressor inlet air pressure fault.
Fault ID 154
Fault
Engine Oil pressure slew rate fault
Description
Root Cause This fault indicates the pressure sensor slew rate is greater than the calibrated 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. Inspect sensor, and lines for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors or hoses, burned or broken sensors). If damaged, replace the sensor per the "Sensor
Replacement Procedures" section in Chapter 72-70. If no damage is found, go to step 4.
4. Inspect harness connection for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors). Contact Lycoming if harness damage is found. If no damage found, go to step 5.
5. 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
sensor. If fault persists, replace the ECU.
*NOTE: This fault could be caused by another oil pressure fault. If there are any other active oil pressure
faults go to troubleshooting steps for the corresponding oil pressure fault.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 20
Troubleshooting Steps
Fault Group 20
Troubleshooting Steps
[FAULT: local compressor inlet air
Fault Name
pressure slew rate]
Fault Lamp
[FAULT: engine oil pressure slew
Fault Name
rate]
Fault Lamp
None
None
Appendix D
Page 435