LANDING GEAR ALTERNATE EXTENSION SYSTEM -LANDING GEAR DOOR CLOSE OPERATION
EFFECTIVITY BEJ ALL 32-35-00
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D633W101-BEJ Sep 05/2002
LANDING GEAR ALTERNATE EXTENSION SYSTEM -BLEED VALVES
General
Four bleed valves let you bleed air from the alternate extension system. You need to bleed the alternate extension system when you replace some of the alternate extension system components.
Location
The bleed valves are near these components:
*
The NLG selector/bypass valve (NLG wheel well)
*
The NLG alternate uplock release actuator (NLG wheel well)
*
The left and right MLG alternate uplock release actuators (left and right MLG wheel wells).
Training Information Point
You operate the alternate extend power pack when you bleed the alternate extension system.
NOTE: The alternate extend power pack operates when you command the landing gear doors open with the ground door release system.
NOTE: The EICAS displays indicate non-normal sequencing during this test.
NOTE: The power pack remains ON until the LDG GR ALTN EXT CONTROL circuit breaker is opened. (The pressure switch that usually stops the power pack does not work since you are bleeding the system.)
CAUTION: MAKE SURE YOU DO NOT RUN THE ALTERNATE EXTEND POWER PACK FOR MORE THAN FIVE MINUTES. IF YOU RUN THE POWER PACK FOR MORE THAN FIVE MINUTES, THE POWER PACK CAN GET TOO HOT. THIS CAN CAUSE DAMAGE TO THE EQUIPMENT.
EFFECTIVITY BEJ ALL 32-35-00
Page 42
D633W101-BEJ Sep 05/2002
LANDING GEAR ALTERNATE EXTENSION SYSTEM -BLEED VALVES
EFFECTIVITY BEJ ALL 32-35-00
Page 43
D633W101-BEJ Sep 05/2002
WHEELS AND BRAKES -INTRODUCTION
General * decel -deceleration
*
ft -feet The wheels and brakes system includes: * fwd -forward
* gnd -ground
*
Wheels, brakes, and tires (SECTION 32-45) * gr -gear
*
*
Brake hydro-mechanical control system (SECTION 32-41) hyd -hydraulic
*
*
Parking brake system (SECTION 32-44) ind -indication
*
Antiskid/autobrake systems (SECTION 32-42) * kts -knots
*
*
Tire pressure indication system (SECTION 32-49) ldg -landing
*
Brake temperature monitor system (BTMS) * LG -landing gear
(SECTION 32-46). * LRU -line replaceable unit
*
lt -left Abbreviations and Acronyms * mdl -module
* MD&T -master dim and test
*
A/B -autobrake
* MFD -multi-function display
*
ACMP -alternating current motor pump
* MLG -main landing gear
*
ADIRU -air data inertial reference unit
* mtrd -metered
*
AIMS -airplane information management system
* NLG -nose landing gear
*
AIV -accumulator isolation valve
* press -pressure
*
altn -alternate
PSEU -proximity sensor electronic unit
* ARINC -aeronautical radio, inc * * psi -pounds per square inch * ASSV -alternate source selection valve * psig -pounds per square inch gage * A/S -antiskid * pwr -power * bat -battery * ref -reference
* BITE -built-in test equipment * rel -release
* brk -brake * rqst -request * BSCU -brake system control unit
* rt -right
* BTMS -brake temperature monitor system * RTO -rejected takeoff * BTMU -brake temperature monitor unit * sec -second
* capt -captain * sel -selector
* ctr -center * sig -signal * ctrl -control * sol -solenoid
* DC -direct current
EFFECTIVITY
32-40-00
BEJ ALL
Page 1 D633W101-BEJ Sep 05/2002
WHEELS AND BRAKES -INTRODUCTION
*
spd -speed
*
stby -standby
*
strg -steering
*
sw -switch
*
sys -system
*
temp -temperature
*
vlv -valve
*
whl -wheel
*
WIU -wheel interface unit
*
xdcr -transducer.
EFFECTIVITY BEJ ALL 32-40-00
Page 2
D633W101-BEJ Jan 05/2002
777 AIRCRAFT MAINTENANCE MANUAL
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