Lycoming TEO-540-C1A Maintenance Manual page 550

Fault ID 444
Fault Take off Reserve output failure driver
Description fault
Root Cause This fault indicates Take off reserve output failure has been consistently detected.
1. If annunciator uses an incandescent bulb, go to step 2. If annunciator uses an LED bulb, go to step 4.
2. Replace the bulb. Does fault become inactive. If yes, go to step 3. If no, go to step 4.
3. 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.
4. Remove connector/wires from annunciator. Complete continuity/short circuit test on annunciator
assembly, using a multi-meter and aircraft wiring manual. If annunciator is defective, replace. If
annunciator passes tests, go to step 5.
5. Complete a continuity test of the harness from the annunciator to the ECU connector using the engine
system schematic in Appendix B and aircraft wiring diagram manual. If the continuity check fails,
isolate to affected harness by disconnecting AF-P1. If engine airframe harness is at fault, contact
Lycoming Engines. If aircraft wiring is at fault, repair in accordance with aircraft maintenance manual.
If the continuity checks good, replace annunciator. If fault persists, replace the ECU.
Fault ID 445
Fault
Description
Root Cause
Fault ID 447
Fault
Description
Root Cause
Fault ID 448
Fault
Description
Root Cause
Appendix D
Page 520
Fault Group 56
Troubleshooting Steps
Fault Group 56
Troubleshooting Steps
Fault Group 56
Troubleshooting Steps
Fault Group 56
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
Fault Name
[FAULT: TOR lamp output failure]
Fault Lamp
Fault Name -Reserved-
Fault Lamp
Fault Name -Reserved-
Fault Lamp
Fault Name -Reserved-
Fault Lamp
© 2018 Avco Corporation. All Rights Reserved
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November 2018