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Low idle range is commanded when in the forward idle position and the airplane is not in an approach configuration.
High idle is commanded when in the forward idle position and the airplane is in an approach configuration.
If the EEC cannot determine whether or not an approach configuration has been set up, then the EEC will default to high idle.
Forward thrust is set by positioning the thrust levers (manually or automatically). Between idle and maximum thrust are various thrust levels such as:
.
Maximum Take-off (MTO) . Maximum Continuous (MCT)
.
Maximum Climb (CLB) . Flexible Take-off (Flex TO)
.
Flexible Climb (Flex CL)
Reverse thrust is a manual selection only.
Each thrust lever drives a dual channel RVDT. Each channel in the RVDT is dedicated to an EEC channel.
Volume 2 Flight Crew Operating Manual Rev 3, Apr 25, 2005
POWER PLANT
THRUST MANAGEMENT (CONT'D)
#1 RVDT #2 RVDT FORWARD
EEC EEC
CHA CHB CHA CHB
AIRCRAFT
DEDICATED
DEDICATED GENERATOR ENGINES GENERATOR
GF1810_041
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
POWER PLANT
The thrust lever quadrant consists of a main lever for setting forward thrust and reverse thrust, with a finger lift lever for thrust reverser operation, Take-off/Go Around (TOGA) switches, autothrottle engage and disengage switches, quick disconnect and engine run switches.
Pressing the TOGA switches will change the pitch and roll on the command bars on the PFD. For more information, see Chapter 4, AFCS.
The autothrottle is engaged by pressing the left and/or right engage/disengage switch(es). It is disengaged by a second press of either engage/disengage switch or by pressing either autothrottle quick disconnect button or by moving the thrust lever manually.
Selecting the ENGINE RUN switches to ON activates fuel pumps, opens the HPSOV in the fuel management unit and initiates the start sequence. Selecting the ENGINE RUN switches to OFF de-activates fuel pumps, closes the HPSOV and shuts down the engine.
Thrust lever movement transmits a signal to a dual channel RVDT. Each channel in the RVDT is dedicated to an EEC channel. The dedicated generator provides (through the EEC) the electrical power required for the RVDT to function. The EEC interprets the RVDT signal as a power demand and adjusts engine parameters accordingly. There is no mechanical likage between thrust lever and engine.
Volume 2 Flight Crew Operating Manual Rev 3, Apr 25, 2005
POWER PLANT
AUTOTHROTTLE
TAKE-OFF/GO AROUND
QUICK DISCONNECT
(TO/GA) SWITCH
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
POWER PLANT
The dual Autothrottle (A/T) system provides, full flight regime, thrust management via automatic positioning of the thrust levers. The A/T system modulates thrust, through dual throttle servo controls, to provide thrust control and speed control. The A/T system can only be used when in EPR control mode.
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