Ch. 2 - Rotor & Transmission

Question 1

The Elastomeric bearings allow the blades to?

Answer 1

Flap, lead, lag and move about its axis for pitch changes

Question 2

Anti-flapping restraints are out at ______.

Droops go in at ________ and out at __________

Answer 2

35% NR

50% NR

70% NR

Question 3

The rotor blade tips are swept 20° to

Answer 3

Provide sound attenuation

And

Increased rotor blade efficiency

Question 4

Tail rotor is

Answer 4

A crossbeam flexible spar canted 20° upward and provide 2.5% lift in a hover

Question 5

The tail rotor indexing system:

Answer 5

Positions blades during pylon fold and

prevents the tail rotor from windmilling in winds up to 60kts when folded.

Question 6

Whenever locking or unlocking the Gust Lock the switch must be

Answer 6

Held in position for at least 5 seconds

Question 7

AVCS IBIT shall only be initiated when?

It corrects for the ___________ vibration

Answer 7

when Rotors are static to avoid damage to components

4 per revolution

Question 8

What is primary function of transmission?

Secondary?

Answer 8

Take power from the engines, reduce the RPM, and transfer it to the main and tail rotors

Drive electric and hydraulic power

Question 9

MGB has:

Answer 9

3° forward tilt

2 accessory mods

2 input mods

1 main module

Question 10

The utility hydraulic system is mounted ____________.

Answer 10

On the right rear quadrant of main transmission

Question 11

Diaphragm coupling allows

Answer 11

For slight misalignment of engine output shaft

Question 12

Freewheeling unit allows

Answer 12

The transmission to disengage from the engine when NR exceeds NP (autorotation)

Question 13

If loud whining noise is heard during rotor engagement you should

Answer 13

Shut down and trouble shoot. It could be a failure of the diaphragm coupler.

Question 14

IGB does what?

Answer 14

Reduces shaft speed and changes angle of drive

Question 15

Tail and IGB gearboxes are

Answer 15

Splash lubricated and provide gear reduction and change and angle of drive.

Question 16

The main transmission oil system is

Answer 16

Wet sump

Also used by the AC generators

It is AIR cooled

Question 17

MAIN TRANSMISSION OIL HOT caution comes on when?

Answer 17

117° C

Question 18

MAIN TRANSMISSION PRESSURE LOW caution comes on when the

Answer 18

The psi is 14 or less

Question 19

When is the chip detector burn off feature deactivated?

Answer 19

above 140° C

Question 20

How many chip detectors are in the transmission?

Which is different?

Answer 20

5

Main module has a 30 second time delay. It also has a temperature sensor for the cockpit.

Question 21

CHIP IBIT

Answer 21

Takes 2 minutes and interrupts 28 Vdc for 40 seconds (no WCAs or Master Caution lights)

Question 22

TDI is on the ______.

Vertical NR sensor is on the _______.

Answer 22

Left

Right

Question 23

Main Rotor RPM?

Tail?

Answer 23

258

1189

Question 24

How is Rotor control provided?

Answer 24

Through the flight control hydraulic servos, which move control rods attached to the swashplate assembly.

Question 25

How is the hydraulic fluid in the main rotor dampers pressurized?

Where is that hydraulic fluid stored?

Answer 25

It is Nitrogen-pressurized

a reservoir mounted inside the main rotor shaft.

Question 26

Pitch control rods extend from the ___ to the ___ on each spindle

Answer 26

rotating swashplate

pitch change horns

Question 27

Describe the main rotor blade.

Answer 27

Pressurized hollow spar, honeycomb core, outer skin, abrasion strips, electrothermal deicing mats, and a removable swept-back blade tip fairing.

Question 28

How can you tell if the Main rotor blade is damaged?

Answer 28

The Blade Inspection Method (BIM) indicators show a black indication due to nitrogen escaping.

Question 29

What happens if you lose both tail rotor control cables?

Answer 29

a spring-tension feature of the tail rotor control system will provide positive pitch on the tail rotor equivalent to left pedal for a midposition collective power setting

Question 30

What happens if you lose one tail rotor control cable?

Answer 30

The tail quadrant will operated normally by controlling the remaining cable against spring tension.

You will get a TAIL ROTOR QUADRANT caution

Question 31

Whenever locking or unlocking the gust lock, the GUST LOCK switch shall be held in the LKD or UNLK position for a minimum of __ to enable the actuator mechanism to complete its cycle.

Answer 31

5 seconds

Question 32

How many sections does the tail drive shaft have?

What connects them?

Answer 32

six

Viscous damped bearings

Question 33

What does the Input module do?

Answer 33

Provides the first gear reduction between the engine and the main module.

Question 34

How does the engine output shaft provide drive from the engine to the input module?

Answer 34

the Diaphragm coupling

Question 35

What does the Accessory module provide?

Answer 35

mounting and drive for the AC Gen and Hyd pump module.

Question 36

Where is the Main Transmission low-oil pressure sensor located?

Answer 36

Left accessory module

Question 37

Describe the route that Transmission oil takes

Answer 37

Oil is pumped from the sump to the Oil Filter (can be bypassed), then to the oil cooler, then through the various modules

Question 38

Where are the pressure readings for the VIDS taken at?

Answer 38

MGB manifold inlet

Question 39

When does the MAIN XMSN OIL HOT advisory appear?

Answer 39

When oil temp is greater than 105C and the caution has not been activated

Question 40

When does the MAIN XMSN PRESS LOW advisory appear?

Answer 40

When oil pressure is less than 30 psi, NR is greater than 25%, and the caution has not been activated

Question 41

When does the MAIN XMSN PRESS HI caution appear?

Answer 41

oil pressure greater than 130 psi

Question 42

When does the MAIN XMSN PRESS HI advisory appear?

Answer 42

When oil pressure is between 65-130 psi and the caution has not been activated

Question 43

When does the INT XMSN OIL HOT or TAIL XMSN OIL HOT caution appear?

Answer 43

140C