Rotor brake

Question 1

How long can the rotor brake be held on for when in Acc Drive?

Answer 1

10 Minutes

Question 2

How long can the Rotor Brake be left in park?

Answer 2

8 hours.

Question 3

What is the pressure when the Rotor brake is selected to on?

Answer 3

55 Psi.

Question 4

At what pressure does the thermal relief valve open ?

Answer 4

180 bar.

Question 5

Under what normal parameters can the rotor brake be applied?

Answer 5

Nr below 47% and both engines off.

Question 6

What will cause the [CHK RTR BRK] warning to come on?

Answer 6

Rotor applied with engine running.

Question 7

What will cause [RTR BRK ON] caution?

Answer 7

Rotor brake hydraulic pressure above 3.5 bar.

Question 8

What will cause the [RTR BRK FAIL] caution?

Answer 8

Dormant failure detected in rotor brake manifold (will only happen on ground)

Question 9

Where is the Rotor brake control valve?

Answer 9

Front face of the No1 Hyd manifold.

Question 10

What are the 4 electrically activated hydraulic valves?

Answer 10

Brake pressure Valve at the top.
Brake off Valve in the center.
Brake enable valve front bottom.
Brake on valve rear bottom.

Question 11

What hydraulic pressure is being applied when the rotor brake is in Park?

Answer 11

140 Bar

Question 12

What prevents you putting power to the rotor brake while in flight?

Answer 12

Weight on wheels switch.

Question 13

With no power available to the aircraft how would you take the rotor brake off?

Answer 13

Manual release on rotor brake manifold.