ENGINE CONTROL
SYSTEM
GENERAL
Engine control can be accomplished in either
computer-on or computer-off (manual) modes.
In the normal, computer-on mode, the DEEC
has full authority for all engine operation and
responds to pilot inputs through RVDTs (ro-
tary variable differential transformers)
mounted on the thrust levers.
Manual mode operation can be conducted with
the L/R ENG CMPTR switch (Figure 7-11)
in the MAN or OFF position. In the MAN and
OFF position, engine control is through me-
chanical linkage between the thrust levers and
the fuel control unit. When operating with
MAN selected the DEEC functions in a su-
pervisory mode to provide engine overspeed
protection and fault monitoring. In the OFF po-
sition the DEEC performs no function at all.
The major components of each engine’s control
system are the engine control panel, thrust lever,
the electronic fuel computer (DEEC), the en-
gine driven fuel pump and the fuel control unit.
LEARJET 45 PILOT TRAINING MANUAL
FOR TRAINING PURPOSES ONLY
FlightSafety
international
7-15
FOR TRAINING PURPOSES ONLY
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