Learjet 60 - Automatic Performance Reserve (AJ,R); Full Authority Digital Electronic Control

Pilot's Manual
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Learjet 60
FULL AUTHORITY DIGITAL
ELECTRONIC CONTROL
A full authority digital electronic control (FADEC), is installed in a
bracket on each engine . Each FADEC has two channels (A and B) each
capable of controlling the engine . During normal operation (ENG
CMPTR switch in AUTO), the most
capable channel is automatically
selected to control the engine . FADEC functions include :
" Thrust Management
" Overspeed Protection
" Bleed-Off Valve
Control
Automatic Performance Reserve
Inlet
Guide
Vane&
Inlet
Stator
Vane
e Ignites Operation
le to control
the engine
through the
FADEC by
changing
TLA input to change desired thrust level . The FADEC receives
input
from several engine sensors and the aircraft's air data computers
and together with the TLA
input
it
determines the appropriate signals
to send to
the
HFCU, the inlet guide
vane and stator vane actuator, and
the
bleed-off valve solenoid to achieve the desired engine operation .
outers provide inlet static pressure (PAAxWj)
signals
to the FADEC . PAMB and
Mach
by the FADEC transducer but used only as
a backup to the
air
data
computer signals . Sensors on the eng
provide inlet total temperature (Tro) signals
to
the FADEC . A TM signal
is
provided
by the
air
data computer, but used only as a backup
to the
engine
sensor signals . Electrical power is supplied by
an engine-driven
permanent-magnet
alternator . Backup power and power for starting is
provided through the EETNAG CH A and ENG CH B circuit breakers an
the pilot's and copilot's circuit breaker panels . On aircraft 6
60-128 not modified by SB 60-76-2
(Replacement of LH and RH FADEC
Wiring Harness), backup power is
available to channel B -during EMER
BUS mode . On
aircraft 61129 and subsequent and prior aircraft modified by
SB 60-76-2, backup power is available to channel A during EMER
BUS
ode .
raft's ad data co
and Mach number as pri
number are also
" Surge
Protection
" Fault Detection
" Ni Bug Setting
" Engine
Synchronization
" Starting
& Shutdown
Control
" Digital ITT