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Quick Relight............................................................................................................. 17-50
Autothrottle System................................................................................................... 17-51
Autothrottle (A/T) Data Sources.......................................................................... 17-51
A/T Limiting ......................................................................................................... 17-51
A/T Monitoring..................................................................................................... 17-52
Electronic Thrust Trim System (ETTS) ............................................................... 17-52
SYNC Mode Selection ........................................................................................ 17-53
N1 SYNC On....................................................................................................... 17-53
N2 SYNC On....................................................................................................... 17-54
EPR CMD SYNC On........................................................................................... 17-54
N1, N2, EPR CMD SYNC Off.............................................................................. 17-55
Sync Annunciation .............................................................................................. 17-55
A/T 1 or 2 Select ................................................................................................. 17-56
A/T Engagement/Disengagement ....................................................................... 17-56
A/T Disengagement ............................................................................................ 17-57
A/T Disengagement and Manual Override.......................................................... 17-58
A/T Mode Operation............................................................................................ 17-59
Takeoff Thrust Control Mode .............................................................................. 17-60
Takeoff Thrust Hold Control Mode ...................................................................... 17-60
Flight Level Change Thrust Control Mode .......................................................... 17-61
Airspeed Control Mode ....................................................................................... 17-62
Retard Mode ....................................................................................................... 17-63
Go Around Thrust Control Mode......................................................................... 17-63
Thrust Reverser System ........................................................................................... 17-64
Thrust Reverser .................................................................................................. 17-64
Reverse Thrust Operation................................................................................... 17-66
Reverser Components ........................................................................................ 17-67
Directional Control Unit ....................................................................................... 17-67
Reverse Thrust Levers........................................................................................ 17-69
Reverser System Lockout ................................................................................... 17-70
Power Plant EICAS Messages ................................................................................. 17-71
EMS Circuit Protection.............................................................................................. 17-75
For Training Purposes Only
Sept 04
17-1
P I LOT T R A I N I N G GU I D E
POWER PLANT
INTRODUCTION
The Global airplane is powered by two BMW-Rolls Royce BR710A2-20 engines,
each mounted on a pylon on either side of the rear fuselage.
The engine is an axial flow, dual shaft turbofan, with a 4.0:1 bypass ratio, with a rated
static thrust of 14,750 pounds at sea level to ISA + 20.
The BR710A2-20 engine contains two main rotating assemblies (spools), a singlestage
low pressure (LP) fan-driven by a two-stage turbine, and a ten-stage high
pressure (HP) compressor, driven by a two-stage turbine. The HP spool provides an
external drive for the accessories mounted on the accessory gearbox.
The engine is made up of eight modules as follows:
• Fan assembly
• Fan case
• Intermediate case
• HP Compressor
• HP Turbine and combustion chamber
• LP Turbine and shaft
• Accessory Gearbox (AGB)
• Bypass duct
Each engine provides bleed air extraction, from either the 5th stage or the 8th stage of
　
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