Lycoming TEO-540-A1A Installation And Operation Manual page 78

6. During the pre-flight test monitor the following:
• Ignition Check - engine speed will dip twice as each half of the redundant ignition system
is disabled and then re-enabled, deactivating half of the spark plugs during each check
• Primary Fuel Injector Test - engine speed will decrease slightly and then recover
• Primary Turbocharger Test - manifold pressure will briefly increase slightly.
• Primary Propeller Control Cycle - the propeller will briefly operate in a cycle to coarse
pitch and decrease the rpm, then go back to fine pitch.
• Secondary Fuel Injector Test - engine speed will decrease slightly and then recover
• Secondary Turbocharger Test - manifold pressure will briefly increase slightly
• Secondary Propeller Control Cycle - the propeller will briefly operate in a cycle to
coarse pitch and decrease the rpm, then go back to fine pitch.
NOTICE: If a fault is found during the pre-flight test, the EECS identifies the fault and
illuminates the NTO PRI and/or NTO SEC annunciators, identify the fault(s) using
the FST, correct the condition(s), and clear the fault(s).
7. Once the pre-flight test is completed, the PFT annunciator goes out. If either the NTO PRI or
NTO SEC annunciator remains illuminated, there is a condition that prevents flight and must
be corrected. Such conditions can be a fault that exceeds set limits or the system does not
have sufficient resources to operate the engine. If a fault is found, refer to the "Engine
Conditions" chapter in this manual.
8. If the TLO annunciator is illuminated after the pre-flight test is completed, check with
maintenance as soon as possible to correct the fault.
NOTICE: Do not take-off if any of the following occur:
• Low, high or surging rpm
• Low, high or fluctuating oil pressure
• Low or high fuel flow
• Excessive manifold pressure
• NTO annunciator illuminated.
NOTICE: If problems are found that go beyond field maintenance, contact Lycoming Engines.
9. The engine is ready for take-off when the oil temperature is greater than 140°F (60°C) and
there are no faults or items that need corrective action.
10. Use smooth transitions of the power control (FULL CLOSED to FULL OPEN in no less than
2 seconds during power control shift) for the desired rpm.
Engine Initiation
Page 56
TEO-540-A1A Engine Installation and Operation Manual
© 2018 Avco Corporation. All Rights Reserved
October 2018