CHAPTER
32
Landing Gear
CHAPTER 32 Landing Gear
32-CONTENTS
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LANDING GEAR -INTRODUCTION
General
These are the landing gear systems (ATA chapter 32):
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Landing Gear -General (32-00, 32-10, 32-20), (32-30)
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Proximity Sensor System (PSS) (32-08)
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Landing Gear (LG) Position Indication and Warning System (32-61)
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Tail Strike System (TSS) (32-71)
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Air/Ground System (AGS) (32-09)
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Steering (32-50)
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Wheels and Brakes (32-40).
Abbreviations and Acronyms
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actr -actuator
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AGS -air/ground system
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altn -alternate
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APU -auxiliary power unit
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ARINC -Aeronautical Radio, Inc.
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ATA -air transport association
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bat -battery
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ctr -center
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ctrl -control
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ELMS -electrical load management system
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ext -extension
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fwd -forward
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gnd -ground
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gr -gear
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hyd -hydraulic
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HYDIM -hydraulic interface module
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ind -indicator
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L -left
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LDG -landing
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LG -landing gear
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lk -lock
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lts -lights
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MFD -multi-function display
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mod -module
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mot -motor
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NG -nose gear
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MLG -main landing gear
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NLG -nose landing gear * opr -operated
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press -pressure
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PSEU -proximity sensor electronics unit
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PSI -pounds per square inch
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PSS -proximity sensor system
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PTT -press-to-test
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R -right
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ref -reference
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ret -retraction
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seq -sequence
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sol -solenoid
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stby -standby
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sw -switch
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sys -system
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TSS -tail strike system
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vlv -valve
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LANDING GEAR -INTRODUCTION
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LANDING GEAR -GENERAL -INTRODUCTION
Purpose
Landing gear structural components hold the weight of the airplane while the airplane is on the ground. These are the landing gear structural systems:
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The main landing gear (MLG) and doors (SECTION 32-10)
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The nose landing gear (NLG) and doors (SECTION 32-20).
Landing gear extension-retraction systems extends and retracts the landing gear to reduce airplane drag in flight. These are the landing gear extension-retraction systems:
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The landing gear control system (SECTION 32-31)
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The main landing gear extension and retraction (SECTION 32-32)
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The nose landing gear extension and retraction (SECTION 32-34)
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The landing gear alternate extension system (SECTION 32-35).
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LANDING GEAR -GENERAL -INTRODUCTION
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LANDING GEAR -DOWNLOCK PINS -MAIN LANDING GEAR
General
There are two main landing gear downlock pins for each main landing gear.
The pins install in the upper side brace lock link and the upper drag brace lock link. Each pin holds the upper toggle and the upper lock link together. You install the downlock pins to prevent MLG retraction.
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LANDING GEAR -DOWNLOCK PINS -MAIN LANDING GEAR
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LANDING GEAR -DOOR LOCKS -MAIN LANDING GEAR
General
Door lock pins prevent the MLG doors from being closed.
The pins go in the MLG door release/safety valve module in each main landing gear wheel well. When installed, the pins prevent the safety valve from moving to the unsafe position.
The door lock pin hole for the left MLG door is on the outboard side of the support structure for the left MLG door uplock hook.
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