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Main Landing Gear Schematic..............................................................................14-3
Wheel Assemblies.................................................................................................14-4
Main Gear/Door Downlock Safety Pin...................................................................14-5
Main Landing Gear Overheat Detection................................................................14-5
Landing Gear Bay Overheat Schematic................................................................14-6
Nose Landing Gear Assembly ....................................................................................14-6
Nose Landing Gear Schematic .............................................................................14-7
Nose Gear Downlock Safety Pin...........................................................................14-8
Landing Gear Electronic Control Unit (LGECU)..........................................................14-8
LGECU System Schematic ...................................................................................14-9
LGECU Control .....................................................................................................14-9
LGECU Control Schematic ................................................................................. 14-11
Landing Gear Control System................................................................................... 14-12
Landing Gear Control Panel................................................................................ 14-12
Landing Gear Indication ...................................................................................... 14-13
Landing Gear Position and Warning System ...................................................... 14-13
Landing Configuration Warning........................................................................... 14-15
Landing Gear Horn Warning Logic...................................................................... 14-16
Gear Warning Horn “MUTED” Switch ................................................................. 14-18
Retraction and Extension System............................................................................. 14-18
Landing Gear Retraction ..................................................................................... 14-19
Landing Gear Extension...................................................................................... 14-20
Manual Landing Gear Extension......................................................................... 14-21
Nosewheel Steering System..................................................................................... 14-25
Nosewheel Steering Schematic ................................................................................ 14-26
Brake Control System ............................................................................................... 14-27
Park/Emergency Brake ....................................................................................... 14-28
Brake Control Schematic .................................................................................... 14-30
Autobrake System..................................................................................................... 14-31
Autobrake Panel.................................................................................................. 14-31
BCU Interface Schematic.................................................................................... 14-32
Brake Temperature Monitoring Unit .......................................................................... 14-33
Brake Temperature Monitoring Schematic.......................................................... 14-33
EICAS Messages...................................................................................................... 14-35
EMS Circuit Protection .............................................................................................. 14-38
P I LOT T R A I N I N G GU I D E
LANDING GEAR AND BRAKES
14-ii For Training Purposes Only
Sept 04
PAGE INTENTIONALLY LEFT BLANK
For Training Purposes Only
Sept 04
14-1
P I LOT T R A I N I N G GU I D E
LANDING GEAR AND BRAKES
INTRODUCTION
The Global landing gear system is a retractable tricycle type consisting of two main
landing gear assemblies and a steerable nose landing gear assembly. Each assembly is
equipped with a conventional oleopneumatic shock strut. On the ground, all three
landing gear assemblies are secured with gear locking pins. The landing gear is fully
enclosed when the gear is retracted.
Normal extension and retraction is electrically controlled by the Landing Gear
Electronic Control Unit (LGECU) and hydraulically operated by systems 2 and 3.
Emergency extension of the landing gear system is enabled through the Landing Gear
　
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