Powertrain

Question 1

What does the transmission system consists of?

Answer 1

It consists of a main transmission with oil cooler,intermediate gear box, tail rotor gear box, and drive shafts. WP0021

Question 2

The main transmission is mounted on the main fuselage with a built in 3⁰ forward tilt and consists of what five modules?

Answer 2

a main module, two input modules, and two accessory modules

Question 3

What allows engine disengagement during autorotation?

Answer 3

The two input modules are mounted on the left andright foward side of the main module (Figure 3). They connect the main module to the engines by shafting and gears. Each input module is identical and directly interchangeable.Over running clutches (freewheeling units) disengagea nonoperating engine from the transmission,but not the accessory module. WP0021

Question 4

Can an accessory module spline adapter be reused after its removal?

Answer 4

Under no circumstances should asplineadapterbereinserted after its removal. This statement applies even after partial insertion and removal. If for any reason anadapteris inserted and removed, a newadaptermust be used.WP0839 CAUTION

Question 5

The main transmission lubrication system cools and filters oil to all gears and bearings. It includes what components?

Answer 5

The system includes two pressure and scavenge, vane-type lubricating pumps that have pressure regulating and bypass valves, a two-stage oil filter, an oil cooler and blower, and warning and indicating systems. WP0022

Question 6

What joins the four sections of the tail rotor drive shaft? What is its purpose?

Answer 6

The sections are joined together by flexible couplings. WP0021

Question 7

What does the Power Train System consists of?

Answer 7

A main transmission, oil cooler, intermediate gear box, tail gear box, and drive shafts

Question 8

Name the five Transmission Modules.

Answer 8

A main module, two input modules, and two accessory modules

Question 9

The input module reduces engine input RPM from ______RPM to ____ RPM and also allows the drive angle to be changed from the engine to the main module.

Answer 9

20,900, 5750

Question 10

What allows engine disengagement during autorotation?

Answer 10

The free-wheel unit inside the input module

Question 11

In case of a non-operating engine, what is driven by the main rotor?

Answer 11

the accessory module will continue to be driven by the main rotor.

Question 12

What is the spline adapter used for?

Answer 12

Used for mounting the main generator to the accessory modules and serves as a protective barrier in the event the generator should seize and fail.

Question 13

What does the Main Transmission Lubricating System consists of?

Answer 13

Oil Pumps, Pressure Regulating Valve, and Oil Filter.

Question 14

The drive shafts are broken down into four sections and transmit torque from the main module to the tail rotor, and are joined together by what?

Answer 14

Multiple disc flexible couplings.

Question 15

The sections I, II, III drive shafts spin at approximately _____ RPM while the section IV drive shaft spins at approximately _____ RPM.

Answer 15

4116, 3319

Question 16

The section II drive shaft connects to the rear of the oil cooler drive shaft and to the section III drive shaft. Each of the three drive shafts are interchangeable. T/F?

Answer 16

TRUE

Question 17

The intermediate gearbox changes the drive angle about __º and reduces input speed of _____ RPM to _____ RPM tail drive output speed.

Answer 17

58º, 4116, 3319

Question 18

Where do we find the procedures if the main module bypass button is found to be extended on preflight or postflight? What must be done?

Answer 18

IETM

Question 19

What component provides the signal to illuminate the CHIP MAIN MDL SUMP legends on the Engine Instrument and Crew Alert System (EICAS) displays on the pilot’s and copilot’s inboard multifunction displays (MFDs) for the Main Gear Box?

Answer 19

The DCU outputs light the CHIP MAIN MDL SUMP caution light.

Question 20

What is the minimum length the rotor brake wear pins can extend before the rotor brake linings have to be replaced?

Answer 20

3/16”

Question 21

What does each chip detector have that prevents minute metal particles from activating the chip capsule by burning them off?

Answer 21

A fuzz suppressing feature that prevents minute metal particles (fuzz) from activating the chip capsule by burning them off.

Question 22

When gear box oil temperature reaches ____°F (____°C), the switch closes and causes the fuzz burn capacitor to discharge. This prevents arcing within the gear box when gear box oil is hot.

Answer 22

284°F, (140°C).

Question 23

How can you test the Chip Detection system?

Answer 23

IBIT through the FMS for Chip1 and Chip 2.