Drives & Rotors

Question 0

When the engines are not running, where does the drive system get power IOT drive components?

Answer 0

APU

Question 1

What is the purpose of the Drive Chain System?

Answer 1

Change the angle of drive and converts the output RPM of the engines into usable power to drive the Main Rotor System, Tail Rotor System, and gear-driven components.

Question 2

Under emergency conditions, the NGB, Main XMSN, IGBO, and TRGB will operate for a minimum of _______ without lubrication

Answer 2

30 minutes

Question 3

The Nose Gear Box (NGB) of each engine _______ RPM and changes the output drive angle ___ degrees.

Answer 3

Reduces

90 degrees

Question 4

The NGB oil system is a ______________ system, holding approx __ pints of oil.

Answer 4

Self-Contained

5 pints

Question 5

The NGB oil filter has an impending bypass indicator (little red button) which will pop when the differential pressure is greater than ______ psid

Answer 5

23 +/- 2 psi differential

Question 6

___________ is installed for emergency lubrication of the NGB bearings in the event the oil supply or oil pressure is lost.

Answer 6

Felt Wicking

Question 7

The main transmission reduces the output speed from the NGB to ___ RPM at the main rotors and ______ at the tail rotor drive at 100% Np.

Answer 7

289 RPM main rotor (approx 300)

4815 RPM tail rotor (approx 5000)

Question 8

There are _ complete oil systems installed in the main XMSN. The No _ side supplies oil to the AGB

Answer 8

2

No. 2 - AGB

Question 9

The rotor brake is ___________ operated.

Answer 9

Hydraulically

Question 10

If XMSN 1 or 2 exceed ______, the APU must be shut down and XMSN fluid allowed to cool for _____ prior to resuming APU ground operations; or fluid may be cooled by ________.

Answer 10

130*C
30 minutes
Operating an engine with rotor turning

Question 11

The components that drive the electrical and hydraulic power are attached to and driven by __________.

Answer 11

The Accessory Gearbox (AGB)

Question 12

Felt wicking provides the Main XMSN a minimum of _________ operation if the oil supply is lost.

Answer 12

30 minutes

Question 13

The ________ reduces XMSN RPM from 4815 to 3636 RPM. The ____________ reduces it further to 1403 RPM before applying it to the Tail Rotor.

Answer 13

Intermediate Gearbox

Tail Rotor Gearbox

Question 14

The intermediate gearbox uses __________ instead of oil for lubrication and is cooled by ___________.

Answer 14

Grease

Cooling Fan. Air is draw from the TRGB, routed down the vertical stabilator, and vented after passing over the IGB

Question 15

The TRGB uses ______ for lubrication.

Answer 15

Grease

Question 16

The APU driveshaft is Driveshaft No. _ and connects the APU to the Accessory Gearbox on the Main XMSN.

Answer 16

7

Question 17

The main rotor driveshaft accepts ________ loads only.
The main transmission accepts ________ loads only.
The static mast accepts __________ loads only.

Answer 17

Main Rotor Driveshaft - Torsional Loads
Mains XMSN - Drive Loads
Static Mast - Flight Loads

Question 18

The main rotor driveshaft is designed to ________ in the event of a gear train seizure. This will allow the aircrew to attempt an __________.

Answer 18

Shear

Autorotation

Question 19

The __________________ is a non rotating shaft that provides an electrical connection between the aircraft and the FCR (UR).

Answer 19

Torque Tube and Reaction Bar

Question 20

The ______________ is a non rotating mount for the MMA.

Answer 20

Derotation Unit (DU)

Question 21

What oil level on the NGB sight gauge indicates proper servicing?
Main XMSN?

Answer 21

1/2 full

An average between the two of 1/2 full each

Question 22

The accessory gearbox (AGB) receives lubricating oil from the _____________.

Answer 22

Main XMSN No. 2 pump

Question 23

[CAUTION] - ACC OIL PSI LOW

What occurred?

Answer 23

Accessory Pump Oil PSI has been detected as low

28 +/- 5 psi while Nr > 10%

Question 24

[CAUTION] - GEARBOX TEMP HIGH | What occurred?

Answer 24

IGB or TRGB temp has been detected as HOT by the thermal alarm unit

Question 25

[CAUTION] - GEARBOX VIBRATION | What occurred?

Answer 25

IGB or TRGB has been detected with excessive vibration

Question 26

[CAUTION] - GEARBOX 1(2) CHIPS | What occurred?

Answer 26

Metallic chips detected in NGB 1(2)

Question 27

[CAUTION] - GEARBOX 1(2) OIL HOT | What occurred?

Answer 27

NGB 1(2) oil temp has been detected as HOT by the thermal sensing switch

Question 28

[CAUTION] - GRBX 1(2) OIL PSI LOW | What occurred?

Answer 28

NGB 1(2) oil PSI has been detected 65%

Question 29

[CAUTION] - ROTOR BRAKE ON/LK | What occurred?

Answer 29

The rotor brake is on or locked; at least one power lever is not off and Nr > 0%

Question 30

[CAUTION] - XMSN CHIPS | What occurred?

Answer 30

Metallic chips detected in the main XMSN

Question 31

[CAUTION] - XMSN 1(2) OIL HOT | What occurred?

Answer 31

Mail XMSN 1(2) oil temp has been detected as HOT by the thermal sensing switch

Question 32

[CAUTION] - XMSN 1(2) OIL PSI LOW | What occurred?

Answer 32

Main XMSN 1(2) oil psi has been detected as low | Psi < 28, Nr > 65% for 30 sec

Question 33

The rotor system consists of what two assemblies?

Answer 33

Main rotor assembly and tail rotor assembly

Question 34

The two rotor assemblies interface with what two systems IOT provide lift, thrust, directional flight control, and anti-torque control?

Answer 34

Drive system | Flight control system

Question 35

The rotor system consists of a 4-bladed, _____________ main rotor assembly and a 4-bladed tail rotor assembly with two ______________.

Answer 35

Fully articulated | Teetering rotor hubs

Question 36

The main rotor system is mounted on the ______________ and driven by the ___________.

Answer 36

Static mast | Main rotor driveshaft

Question 37

The diameter of the main rotor assembly is __ feet.

Answer 37

48 feet

Question 38

The main rotor hub assembly allows ______, ________, and __________ motion of the rotor blades and system. It holds the entire main rotor assembly to the ___________ and accepts driving torque transmitted to the _____ from the main XMSN by a driveshaft inside the ________.

Answer 38

Feathering, Flapping, and Lead-Lag motion Static Mast Hub - Static Mast

Question 39

What do the Strap Pack Assemblies do?

Answer 39

Permit flapping and feathering motion and transmit centrifugal loads from the main rotor blades to the hub.

Question 40

The strap pack assemblies consist of __ steel laminates.

Answer 40

22

Question 41

What assembly provides the means for controlling the main rotor pitch angle?

Answer 41

Pitch Housing Assemblies

Question 42

The ___________ at the inboard end of the Pitch Housing Assembly receives control inputs from a pitch change link attached to the rotating swashplate.

Answer 42

Pitch Arm

Question 43

What do the Lead-Lag Dampers do?

Answer 43

Control the lead-lag motion of the rotor blades and prevent mass imbalance (un-equal blade spacing)

Question 44

What is the purpose of the Lead-Lag Links?

Answer 44

Transmit blade lead-lag loads into the dampers, blade centrifugal force into the strap pack assembly, and control inputs from the pitch housing to the main rotor blade

Question 45

What component provides the pivot point for the main rotor blade flapping and feathering action and provides the mounting point for the pitch housing assembly?

Answer 45

Feathering Bearing Housing Assembly

Question 46

The ________________ restrict downward blade flap excursion. They are in constant contact with the striker plate when the rotor is not producing lift.

Answer 46

Droop Stop Followers

Question 47

What does the Droop Stop Ring do?

Answer 47

Restrict main rotor blade downward coning and downward blade flap excursion

Question 48

What transfers static electricity from the main rotor hub to the static mast?

Answer 48

Electrical Brush Assembly

Question 49

What secures the hub to the static mast? | What secures this component?

Answer 49

Hub Retention Nut | Lock Ring secures the Hub Retention Nut

Question 50

What transfers rotating motion from the main rotor drive shaft to drive the man rotor head assembly?

Answer 50

Main Rotor Drive Plate

Question 51

When an FCR / UR (mast mounted assembly) is not installed, the _______________ provides environmental protection.

Answer 51

Driver Plate Close Out Assembly

Question 52

The ____________ provides a stationary mounting point for the mast mounted assembly.

Answer 52

Derotation Unit (DU)

Question 53

The main rotor blades are ___ feet long and incorporate a negative ___ degree twist.

Answer 53

20. -9 degree

Question 54

Is there a voice warning for low rotor RPM? | High rotor RPM?

Answer 54

Yes. Yes. 95% > Nr > 105%

Question 55

The main rotor assembly is mounted on what component?

Answer 55

Static Mast

Question 56

What component carries the centrifugal force load?

Answer 56

Strap Pack Assemblies

Question 57

What is used to attach the main rotor blade to the lead lag link?

Answer 57

Blade Attachment Pin

Question 58

The ______________ is a four bladed, semi-rigid, teetering, single head design.

Answer 58

Tail Rotor Assembly

Question 59

The ____________ provides attaching points for the tail rotor blades and the means to drive the blades.

Answer 59

Tail Rotor Head Assembly

Question 60

The _________ is mounted to the output shaft of the tail rotor gearbox and provides mounting points for the two tail rotor hubs

Answer 60

Fork Assembly

Question 61

What is the purpose of the elastomeric bearings?

Answer 61

Allow the hubs to teeter on the fork

Question 62

What assembly provides for attachment of the tail rotor blades to the hubs and transmit centrifugal force to the head assembly? This component also allows for feather motion by allowing the blade to twist

Answer 62

Strap Assemblies