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06 HYDRAULICS, FLIGHT CONTROLS, LANDING GEAR, BRAKES
1
V I R T U A L
N E X T G E N E R A T I O N
BOEING 737 NEXT GENERATION
Course overview
V I R T U A L
– Airplane General
– Air Systems
– Warning Systems, Communications, Ice & Rain Protection
– Electrical
– Engines, APU, Fuel System
– Hydraulics, Flight Controls, Landing Gear, Brakes
– Flight Instruments & Displays
– Automatic Flight
– Flight Management, Navigation
– Normal Operations
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Topics
V I R T U A L
Hydraulic system– Overview– Controls & indicators– Hydraulic power distribution– A & B systems– System leaks– Power transfer unit– Landing gear transfer unit– Standby system
Landing gear & brakes– Controls & indicators– Landing gear operation– Brake system– Air/Ground system
Flight controls– Overview– Controls & indicators– Roll control
• Ailerons• Flight spoilers
– Pitch control• Elevators• Stabilizer• Stalls
– Yaw control• Rudder• Yaw damper
– Speed brakes– Flaps & slats
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemOverviewThe airplane has three hydraulic systems: A, B and standby. The standby system is used if system A and/or B pressure is lost. The hydraulic systems power the following systems:
• flight controls• leading edge flaps and slats• trailing edge flaps• landing gear• wheel brakes• nose wheel steering• thrust reversers• autopilots
Either A or B hydraulic system can power all flight controls with no decrease in airplane controllability.
Each hydraulic system has a fluid reservoir located in the main wheel well area. System A and B reservoirs are pressurized by bleed air. The standby system reservoir is connected to the system B reservoir for pressurization and servicing. Pressurization of all reservoirs ensures positive fluid flow to all hydraulic pumps.
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemControls & indicators: Hydraulic panel
V I R T U A L
Hyd pump LOW PRESS lights
ELEC hyd pump overheat lights
ELEC hyd pump switches
ENG hyd pump switches
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemControls & indicators: Indications (DU)
V I R T U A L
System pressure indication
Caution (amber) operating limit (red)
Caution (amber) operating limit (red)
Sys quantity indication
Refill indication
06 HYDRAULICS, FLIGHT CONTROLS, LANDING GEAR, BRAKES
2
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemMain wheel well
V I R T U A L
SYSTEM A & Breservoirs
Pressure gauge
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemControl & indicators: Flight control panel
V I R T U A L
Flight Control switches
Flight Control LOW PRESSURE lights
Standby hyd LOW QUANTITY lightStandby hyd LOW PRESSURE lightStandby rudder ON light
Alternate Flaps master switch
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemHydraulicPowerDistribution
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemA & B systemsComponents powered by hydraulic systems A and B:
System A• ailerons• rudder• elevator and elevator feel• flight spoilers (two on each wing)• ground spoilers• alternate brakes• No. 1 thrust reverser• autopilot A• normal nose wheel steering• landing gear• power transfer unit (PTU)
V I R T U A L
System B• ailerons• rudder• elevator and elevator feel• flight spoilers (two on each wing)• leading edge flaps and slats• normal brakes• No. 2 thrust reverser• autopilot B• alternate nose wheel steering• landing gear transfer unit.• autoslats• yaw damper• trailing edge flaps.
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Hydraulic systemStandby system
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsOverviewFlight control surfaces location
V I R T U A L
06 HYDRAULICS, FLIGHT CONTROLS, LANDING GEAR, BRAKES
3
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsControl & indicators: Flight control panel
V I R T U A L
Flight Control switches
Flight Control LOW PRESSURE lights
Standby hydraulic system lights
Feel Differential Pressure lightSpeed Trim Failure light
Alternate Flaps master switchAlternate Flaps position switch
Flight Spoiler switches
Yaw Damper light
Yaw Damper switch
Mach Trim Failure lightAutomatic Slat Failure light
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsControl & indicators: LE devices
V I R T U A L
LE panel test switch
LE devices TRANSIT light
LE devices EXTENDED light
LE devices FULL EXT light
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsControl & indicators: Stabilizer
• Stab Trim Wheel (Control Stand)• Stab Trim Indicator
– Stab Trim Green band range• Stab Trim Switches (Control Wheel)• Stab Trim Main Elec Cutout Switch
(Control Stand)• Stab Trim Autopilot Cutout Switch
(Control Stand)• Stab Trim Override Switch• Stab Out of Trim light
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsRoll Control
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsPitch Control
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsYaw Control
V I R T U A L
06 HYDRAULICS, FLIGHT CONTROLS, LANDING GEAR, BRAKES
4
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsSpeed Brakes
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Flight controlsLE devices & TE flaps
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesNose landing gear
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesMain landing gear
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesControls & indicators: Landing gear panel Autobrake & antiskid controls
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesIndications
V I R T U A L
06 HYDRAULICS, FLIGHT CONTROLS, LANDING GEAR, BRAKES
5
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesIndications
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesMain landing gear (photo)
V I R T U A L
BOEING 737 NEXT GENERATION
HYD, FLT CONT, LDG GEAR, BRAKES
Landing Gear & BrakesPushback procedures
V I R T U A L
BOEING 737 NEXT GENERATIONV I R T U A L
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