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NLG MANUAL EXTENSION SYSTEM - NLG RELEASE MECHANISM
EFFECTIVITY
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NLG MANUAL EXTENSION SYSTEM - NLG RELEASE MECHANISM
NLG MANUAL EXTENSION SYSTEM - NLG RELEASE MECHANISM
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
Pull on the NLG manual extension handle in the flight
compartment to operate the NLG manual extension system.
Functional Description
When you pull on the handle, the quadrant turns the cam in the
release mechanism. The cam operates the cam roller which
then turns the release roller forward.
When the release roller rotates forward, it pushes on the
forward lock link of the nose landing gear. This unlocks the lock
mechanism and the nose landing gear extends to the down and
locked position by airloads and gravity.
NLG MANUAL EXTENSION SYSTEM - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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NLG MANUAL EXTENSION SYSTEM - FUNCTIONAL DESCRIPTION
NLG MANUAL EXTENSION SYSTEM - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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General
The wheels and brakes system includes these systems:
* Tires and wheels
* Hydraulic brake system
* Parking brake system
* Antiskid/autobrake system.
Abbreviations and Acronyms
* AACU - antiskid/autobrake control unit
* A/B - autobrake
* AC - alternating current
* accum - accumulator
* ADIRU - air data inertial reference unit
* alt - alternate
* bat - battery
* BIT - built-in test
* BITE - bulit-in test equipment
* BMV - brake metering valve
* cont - control
* DC - direct current
* fwd - forward
* gnd - ground
* hyd - hydraulic
* inbd - inboard
* ind - indicator
* inop - inoperative
* kts - knots
* KPA - kilopascals
* L - left
* LG - landing gear
* microsw - microswitch
* MLG - main landing gear
* max - maximum
* NLG - nose landing gear
* norm - normal
* NWS - nose wheel steering
* outbd - outboard
* P - pressure
* PSEU - proximity switch electronics unit
* PSI - pounds per square inch
* R - right
* RTO - rejected takeoff
* sec - seconds
* sol - solenoid
* sw - switch
* sys - system
* vlv - valve
* ww - wheel well
WHEELS AND BRAKES - INTRODUCTION
EFFECTIVITY
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WHEELS AND BRAKES - INTRODUCTION
WHEELS AND BRAKES - INTRODUCTION
EFFECTIVITY
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WHEELS AND BRAKES - INTRODUCTION
WHEELS AND BRAKES - INTRODUCTION
EFFECTIVITY
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Purpose
The hydraulic brake system controls hydraulic pressure to the
main landing gear brakes.
Brake hydraulic source selection uses the alternate brake
selector valve and the accumulator isolation valve to control
different pressure sources to supply pressure to these brake
　
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