Aviation Structural Mechanic Navedtra 14315 Chapter 13

Front 1

What is indicated in the pilot's position indicator when the landing gear is in transition from gear down to gear up?

Back 1

barber poles

Front 2

In addition to the pilot's position indicator, what other device tells you that the landing gear is in transit from gear down to gear up?

Back 2

the transition light in the landing gear handle

Front 3

During emergency operation, what indications are shown on the pilot's position indicator and on the landing gear handle?

Back 3

the same indications as during normal landing gear operation

Front 4

What component of the emergency landing gear system actuates the release valves on three of the four nitrogen bottles.

Back 4

the manually operated nitrogen bottle

Front 5

What component is used to hold the doors of a landing gear system in the closed position?

Back 5

latches

Front 6

What are the principal components of a latch mechanism?

Back 6

hydraulic latch cylinder, latch hook, sprin-loaded linkage, and a sector

Front 7

What component provides a main gear up-and-locked indication on the pilot's cockpit indicators?

Back 7

up lock switch

Front 8

What is the required clearance for a landing gear door latch roller?

Back 8

1/8 inch-3/32 inch

Front 9

What determines the distance a landing gear door will travel?

Back 9

length of the door linkage and adjustment of the doorstops

Front 10

A shock strut uses hydraulic fluid and what other substance to absorb and dissipate shock?

Back 10

compressed air or nitrogen

Front 11

What chamber of a metering pin-type shock strut contains the hydraulic fluid?

Back 11

the lower chamber

Front 12

Where can you find information concerning the correct type of hydraulic fluid to be used in a shock strut?

Back 12

on the instruction plate attached to the strut

Front 13

When does the compression stroke of a shock strut begin?

Back 13

when the aircraft hits the ground

Front 14

What part of the shock strut acts like a spring to return the strut to normal?

Back 14

the compressed air or nitrogen

Front 15

What component of a landing gear system attaches the upper drag brace to the wheel well?

Back 15

a trunnion

Front 16

All drop checks should be accomplished in accordance with what manual?

Back 16

the applicable maintenance instruction manual (mims)

Front 17

What is the first step in performing a drop check?

Back 17

place the aircraft on jacks

Front 18

What is the maximum pressure required to retract and lock a landing gear during a drop check?

Back 18

1800 psi at 4 gallons per minute (gpm)

Front 19

The force applied to the axle hubs to push a landing gear into the down and locked position should not exceed what force

Back 19

twenty pounds

Front 20

What device can be used to detect internal leakage of a landing gear hydraulic component?

Back 20

ultrasonic leak detection translator

Front 21

Other then normal servicing and removal and replacement, what other type of maintenance can be performed on a shock strut at the organizational level?

Back 21

replacing the piston O-ring and the delta ring

Front 22

After the aircraft is on jacks, what is the next step in removing a shock strut?

Back 22

remove the tire/wheel and brake assembly to reduce the weight of the strut

Front 23

What type of air valve is used on most naval aircraft?

Back 23

type MS 28889

Front 24

How many turns and in one direction must you turn an air valve swivel nut to realease the strut pressure?

Back 24

approximataley two turns counterclockwise

Front 25

What is the proper torque for installing an air valve on a shock strut?

Back 25

100 to 110 inch-pounds

Front 26

In what position does a shock strut need to be before it can be bled?

Back 26

fully extended

Front 27

When should the exposed piston of a shock strut be cleaned?

Back 27

during each preflight and postflight inspection

Front 28

Excessive leaking of fluid from a shock strut can usually be fixed by what method?

Back 28

deflate the strut and tighten the packing gland nut

Front 29

What is the first step in disassembling a shock strut once it is removed from the aircraft?

Back 29

ensure that all pressure has been removed from the strut.

Front 30

When bench testing a rebuilt shock strut, it must not leak when filled with nitrogen for how long?

Back 30

one hour

Front 31

A landing gear system is operated and controlled by what means?

Back 31

a landing gear system is hydraulically operated and electrically controlled

Front 32

What does a typical fixed-wind aircraft landing gear configuration consist of?

Back 32

two main landing gears and one steerable nose landing gear

Front 33

In what direction does the nose landing gear of a fixed-wing aircraft retract?

Back 33

either forward or rearward into the fuselage.

Front 34

At what time does the centering device of a nose landing gear ensure that the strut and the nose wheel are aligned?

Back 34

when the weight of the aircraft is off the gear

Front 35

What type of landing gear is found on a H-53 helicopter?

Back 35

retractable nose gear

Front 36

On the H-60 helicopter, what landing gear assembly includes the weight-on-wheels sensing switch?

Back 36

the left main landing gear assembly

Front 37

What type of tail landing gear is incorporated on the H-60 helicopter?

Back 37

cantilever type

Front 38

During normal operation, what component disengages the down lock, allowing the nose landing gear cylinder to raise the nose gear?

Back 38

the downlock cylinder

Front 39

During normal operation, what component closes the nose landing gear doors?

Back 39

mechanical linkage

Front 40

What type of landing gear is found on a H-60 helicopter?

Back 40

nonretractable gear