Lycoming TEO-540-C1A Maintenance Manual page 443

TEO-540-C1A Engine Maintenance Manual
Fault ID 59
Fault
Cylinder 4 excessive CHT
Description
Fault ID 60
Fault
Cylinder 5 excessive CHT
Description
Fault ID 61
Fault
Cylinder 6 excessive CHT
Description
Fault ID 62
Fault
Cylinder 7 excessive CHT
Description
Fault ID 63
Fault
Cylinder 8 excessive CHT
Description
This fault indicates the CHT (Cylinder Head Temperature) has consistently exceeded its
maximum temperature limit prescribed in Appendix A of the TEO-540-C1A Engine
Root Cause
Installation and Operation Manual. This fault will become inactive once the CHT is
below the maximum limit
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? If
yes, continue. If no, go to step 3. Does the behavior of the engine correspond to the fault? If yes, are
other CHT showing higher than normal with or without a fault? If yes, go to step 2. If no to engine
behavior or other CHT's, go to step 5.
2. Inspect engine and airframe baffles to ensure that there are no leaks. If no defects or leaks found, go to
step 3.
3. Using the FST, download active and service fault logs.
4. Review logs to determine if there are any faults for the following sub-systems in the active or service
fault logs and go to the step that corresponds to the fault:
a. CHT
b. Induction System (MAP, CIP, Deck Pressure)
c. Fuel
d. Injector
If faults are found for step 4a, complete steps 5 and 6. If faults are found for step 4b, complete step 8. If
faults found for step 4c, complete step 9. If faults are found for step 4d, complete step 10.
5. Inspect CHT sensor, and lead for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors, burned or broken sensors). Replace any damaged sensors per the "Sensor Replacement
Procedures" section in Chapter 72-70. If sensor is good, go to step 6.
6. Inspect CHT harness connection for any damage (eg...burned, broken or frayed wires, cracked or
broken connectors). Contact Lycoming if harness damage is found.
7. If steps 5 and 6 check good, swap the sensor from the channel giving the fault with another sensor on a
different cylinder. Does the fault move with the sensor? If so, replace the sensor per the "Sensor
Replacement Procedures" section in Chapter 72-70. If the fault does not move, 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, go to next step.
8. Inspect for any induction leak. If no leaks are found, refer to troubleshooting for fault recorded in step 4.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 8
Fault Group 8
Fault Group 8
Fault Group 8
Fault Group 8
Troubleshooting Steps for Faults 56 thru 63
[FAULT: Cylinder 4 CHT over
Fault Name
temperature]
Fault Lamp
[FAULT: Cylinder 5 CHT over
Fault Name
temperature]
Fault Lamp
[FAULT: Cylinder 6 CHT over
Fault Name
temperature]
Fault Lamp
[FAULT: Cylinder 7 CHT over
Fault Name
temperature]
Fault Lamp
[FAULT: Cylinder 8 CHT over
Fault Name
temperature]
Fault Lamp
TLO
TLO
TLO
TLO
TLO
Appendix D
Page 413