Rotor Brake

Question 1

Where is the rotor brake power pack mounted?

Answer 1

Left side of forward transmission

Question 2

What are the components of the rotor brake system? (8)

Answer 2

Brake unit
Power pack unit
Remote control switch (fwd X-men deck)
Control switch (cockpit)
Interlock limit switch
2 AC frequency control relays
Rotor brake warning light

Question 3

What prevents rotor brake application when the ECLs are in FLY?

Answer 3

AC frequency control relays

Question 4

What prevents the ECLs from being moved beyond start when the rotor break is already engaged?

Answer 4

Physical stop, rotor brake arming lever

Question 5

At what PSI does the ROTOR BRAKE ON master caution illuminate?

Answer 5

10+/-2 PSI

Question 6

How is the rotor brake disk mounted?

Answer 6

Bolted to the input shaft, to stop the entire drive train

Question 7

What PSI does the power pack supply the brakes with? How long does it take to fully develop delivery pressure?

Answer 7

550 psi

Approx 5 seconds

Question 8

What are the components of the hydraulic power pack? (7)

Answer 8

Motor driven pump
Pump motor relay
Solenoid valve
Combined hydraulic reservoir /accumulator 
System pressure switch
Relief valve
Pressure indicating switch

Question 9

When will the system pressure switch interrupt power to the pump motor?

Answer 9

800 PSI and will re-activate at at 600PSI

Question 10

What PSI will the relief valve return fluid to the reservoir?

Answer 10

900 PSI

Question 11

What is the minimum Nr to apply the rotor brake?

Answer 11

45% to avoid cracking of the fwd transmission case