Mod 2-3

Question 1

where is most used contact split race bearing ?

Answer 1

junction between stationary side of the heli to the rotating drive train

Question 2

identify the bering part

Answer 2

A-OUTER RACE

B-SHOULDERS

C-INNER RACE

D-BEARING

E-CAGE

Question 3

Main Rotor Grips must be secured from:

Answer 3

Rotation beyond 90 degrees

Question 4

Split Cones (P/N: 206-010-003-001) may do what when the hub is raised?

Answer 4

fall

Question 5

Prior to removal of the main rotor blade from the hub, the nut securing the Blade Latch must be loosened. Only the nut on the _____ side is to be loosened.

Answer 5

trailing edge

Question 6

The hardware securing the swashplate to the main rotor gearbox oalso secures the

Answer 6

main rotor mast

Question 7

The spar of the R22 main rotor blades is made of

Answer 7

stainless steel

Question 8

On a main rotor blade, exposure of the bond line between the skin and the spar due to erosion can lead to:

Answer 8

Debonding of the blade skins

Question 9

R22 Main Rotor Blade Pitch bearings are lubricated with

Answer 9

Oil A257-4

Question 10

Bell 206 Main Rotor Heads (C-GKGO) are lubricated with

Answer 10

Grease

Question 11

According to Bell Helicopters, what is the definition of Total Indicated Runout (TIR)?

Answer 11

measure of eccentricity of a shaft, measurements are usually taken with a dial indicator at specifics points as the shaft rotate through 360 degrees

Question 12

According to Bell Helicopters, what is the cause of Brinelling?

Answer 12

surface depression.

Severe blow: extreme heavy pressure, rollers skidding or sliding instead of rolling

Question 13

Where is the tail rotor driveshaft rotated to check the runout on the R22?

Answer 13

A166 clutch shaft

Question 14

The duplex bearing must be:

Answer 14

In matched serial numbered sets

Question 15

Swashplate Friction is the friction between the bearing set and the:

Answer 15

Pivot Sleeve

Question 16

A new complete Swashplate shim has a total thickness of:

Answer 16

0.041”

Question 17

Finish this sentence: When installing the bolts during the swashplate friction adjustment, ensure the countersunk side of the washers is

Answer 17

Toward bolt head.

Question 18

what does a tip shape of the blades

Answer 18

Reduce losses caused by tip vortices. This results

in increased efficiency, translatin ng into higher

speed and less noise

Question 19

tip weights as part of the design

Answer 19

to allow more time to setup autorotation, and more time to flare during landing

Question 20

tip weights as part of on going maintenance

Answer 20

span-wise balance

Question 21

abrasion strips can be

Answer 21

stainless

blade tape

nickel

Question 22

main rotor blade foldings requires?

Answer 22

• Modified blade pins or aTachment hardware.
• Addition of hard-­‐points to attach supports for the blades

Question 23

what is gap fit ?

Answer 23

• a distance between parts
• often used to allow for expansion or other deformation resulting from temp or load

Question 24

what is preload ?

Answer 24

• a clamping force applied typically to a bearing
• prevents or limits movement

Question 25

what is pinch fit?

Answer 25

is a negative gap, similar to preload

opposite to the gap fit