Main Rotor Drives (63)

Question 1

What is the tilt of the MGB?

Answer 1

6deg fwd

Question 2

What speed is the engine drive shaft rotating?

Answer 2

14400rpm

Question 3

What is the purpose of the freewheel actuator?

Answer 3

To enable ENG#1 to run in APU mode

Question 4

What are the modules of the MGB?
(3)

Answer 4

• Upper case
• Main case
• Accessory Gearbox

Question 5

What is on the AGB?
(5)

Answer 5

• # 1 Hyd Pump
• # 1 Oil Pump
• # 2 Hyd Pump
• ECS compressor
• AC Generator (Optional)

Question 6

What is the MGB made from?

Answer 6

Magnesium Alloy

Question 7

When in ACCESSORY Mode, what is being driven in the AGB?
(3)

Answer 7

• # 1 Oil Pump-#1 Hyd Pump
• ECS

Question 8

How many MGB oil pumps are three and where are they fitted?

Answer 8

2
1 - AGB
2 - MGB

Question 9

How many chip detectors are there in the MGB and where are they located?

Answer 9

3
- 2 In sump
- 1 In mast

Question 10

What sensor activates the [ROTOR HIGH] & [ROTOR LOW] WARNINGS?

Answer 10

The Mast speed sensor in the MGB
(high one)

Question 11

What sensor outputs the speed of the main rotor (Nr) to the cockpit display?

Answer 11

Tail Take-off sensor
(lower)

Question 12

How is the Rotor Brake attached to the main drive system?

Answer 12

To the rear of the MGB

Question 13

How is the Rotor brake designed to prevent flammable fluids from coming into contact with the rotor brake disc and calliper assembly?

Answer 13

Titanium cover
(fire guard)

Question 14

How is the rotor brake actuated and secured?

Answer 14

• Electrically driven
• Mechanically secured

Question 15

What happens after 60 seconds of the Rotor Brake being selected ON?

Answer 15

Mechanical parking brake is engaged

Question 16

Where can the Rotor Brake condition be accessed?

Answer 16

1. Helo display
2. Synoptic display

Question 17

At what speed can the Rotor Brake be applied?

Answer 17

40% Nr