Faults - Lycoming TEO-540-A1A Installation And Operation Manual

TEO-540-A1A Engine Installation and Operation Manual
NOTICE: Record any problems and maintenance-significant events in the engine logbook. Record
the magnitude and duration, and any out-of-tolerance values.
Fault Isolation - Use of Field Service Tools
NOTICE: Do not use the Field Service Tool (FST) during flight.
Refer to the Appendix C of the TEO-540-A1A Engine Maintenance Manual or the latest revision
of SSP-118 for instructions to use the FST.
No diagnostic devices other than the Field Service Tool are to be used at any time on this engine.

Faults

The EECS collects fault code data. Maintenance personnel use this data for diagnostic and
continuous airworthiness. Refer to Appendix D in the TEO-540-A1A Engine Maintenance Manual
for a list of fault codes and corrective action.
Due to the built-in redundancy, the EECS can continue engine operation in a safe condition even if
there is a single fault failure or malfunction or combination of electrical failures or electronic
components failure.
Required Action for Engine Conditions
Table 1 identifies corrective action for engine conditions prior to and during flight. Detailed fault
isolation is included in the TEO-540-A1A Engine Maintenance Manual.
Engine Condition
Displays
Engine-indicating data not
available
Incorrect engine-indicating data
Annunciators
NTO PRI or NTO SEC
annunciators stay illuminated after
Pre-Flight Test ends
NTO PRI and/or NTO SEC
annunciators stay illuminated for
more than 10 seconds during flight
© 2018 Avco Corporation. All Rights Reserved
October 2018
ENGINE CONDITIONS
Table 1
Action for Engine Conditions
Explanation/Corrective Action
Do not take-off until Maintenance identifies and corrects
the cause.
Do not take-off until Maintenance identifies and corrects
the cause.
There is a fault out of tolerance of set limits or the EECS
does not have sufficient resources to operate the engine.
Do not take-off. Identify the fault(s) using the FST,
correct the condition(s), and clear the fault(s).
Make minimum power control changes and land as soon
as safely possible. Identify the fault(s) using the FST,
correct the condition(s), and clear the fault(s).
NOTICE: An illuminated NTO annunciator does not
indicate an emergency. The illuminated
annunciator(s) indicate(s) that a component
has failed and has put the EECS in a mode
with decreased redundancy.
Engine Conditions
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