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lever and the reverse thrust lever at the same time.
Thrust Lever Resolver
There are two thrust lever resolver assemblies, one for each
engine. Each thrust lever resolver assembly has two resolvers,
one for EEC channel A and one for EEC channel B. The thrust
lever resolvers change the mechanical forward and reverse
thrust lever positions to analog thrust lever resolver angle
(TRA) signals. These signals go to the EEC. The EEC uses these
signals to control the engine.
See the Engine Fuel and Control section for more information
on EEC engine control. (SECTION 73-21)
Start Levers
There are two start levers, one for each engine. You use the
engine start lever during an engine start. You also use it to
shutdown the engine. The start levers operate switches which
supply signals to different aircraft and engine systems and
components.
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Reverse Thrust Interlock Solenoids
There are two reverse thrust interlock solenoids, one for each
engine. Each reverse thrust interlock solenoid limits the range
of motion of a reverse thrust lever. You can make the thrust
reverser deploy, but you can not increase the reverse thrust
until the thrust reverser sleeves are near the full deployed
position. The EEC operates the solenoids. The thrust lever
interlock solenoids are in the autothrottle assembly. You must
lower the autothrottle assembly to access the thrust lever
interlock solenoids.
See the thrust reverser section for more information.
(SECTION 78-31)
See the autoflight chapter for more information on the
autothrottle system. (CHAPTER 22)
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Component Locations
The thrust levers and the start levers are on the control stand in
the flight compartment. You remove panels from the aisle stand
to get access to these components:
* Start lever switches
* Interlock latch
* Thrust lever cranks and rods.
The reverse thrust interlock solenoids and thrust lever
resolvers are in the autothrottle assembly. The autothrottle
assembly is under the flight compartment floor in the forward
equipment compartment. You go into the forward equipment
compartment through the access door, forward of the nose
landing gear.
See the autothrottle section for more information on the
autothrottle assembly. (SECTION 22-31)
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General
These equipment and mechanisms related to the engine control
system are on the control stand and below the flight
compartment floor in the autothrottle assembly:
* Resolvers
* Clutch pack
* Autothrottle switch packs
* Autothrottle servomotor (ASM) and gearbox assembly
* Take off/go-around (TO/GA) switches and autothrottle
disengage switches.
Resolvers
There are two resolver assemblies, one for each engine. Each
thrust lever assembly drives a resolver. The resolver changes
the forward and reverse thrust lever positions to an analog
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