Engine Initiation
© 2018 Avco Corporation. All Rights Reserved
Page 56
October 2018
TEO-540-A1A Engine Installation and Operation Manual
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.
