Lycoming TEO-540-C1A Maintenance Manual page 513

TEO-540-C1A Engine Maintenance Manual
Fault ID 305
Fault
Trip Tacho time invalid fault
Description
This fault indicates trip tacho time is invalid possibly due to a data logger fault or
Root Cause
EEPROM memory corruption.
1. If equipped with a data logger, continue step 1, if not, continue to step 2. Are there any active data
logger faults? If no, go to step 2. If yes, go to step 3.
2. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 4. If yes, go to step 5.
3. Inspect data logger and cabling for damage. If damage is noted, repair damage in accordance with
aircraft maintenance manual. If data logger is damaged, replace.
4. 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.
5. Set ignition switch to on, do not start engine, complete step 2. Is fault still active? If no, sequence
complete. If yes, replace the ECU.
Fault ID 306
Fault
Trip time discrepancy fault
Description
This fault indicates trip time differs between primary and secondary channel possibly due
Root Cause
to a memory corruption or one channel being down while the other was running.
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 2. If yes, go to step 3.
2. 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.
3. Set ignition switch to on, start engine. Shut down engine, complete step 2. Is fault still active?
no, sequence complete. If yes, replace the ECU.
Fault ID 307
Fault
Trip time invalid fault
Description
This fault indicates trip time is invalid possibly due to a data logger fault or EEPROM
Root Cause
memory corruption.
1. If equipped with a data logger, continue step 1, if not, continue to step 2. Are there any active data
logger faults? If no, go to step 2. If yes, go to step 3.
2. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault active? If no, go to step 4. If yes, go to step 5.
3. Inspect data logger and cabling for damage. If damage is noted, repair damage in accordance with
aircraft maintenance manual. If data logger is damaged, replace.
4. 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.
5. Set ignition switch to on, do not start engine, complete step 2. Is fault still active? If no, sequence
complete. If yes, replace the ECU.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 39
Troubleshooting Steps
Fault Group 39
Troubleshooting Steps
Fault Group 39
Troubleshooting Steps
Fault Name
[FAULT: trip tacho time invalid]
Fault Lamp
Fault Name
[FAULT: trip time discrepancy]
Fault Lamp
Fault Name
[FAULT: trip time invalid]
Fault Lamp
None
None
If
None
Appendix D
Page 483