Valves

Question 1

Safety Valve LOCATION

Answer 1

Aft hyd compartment, forward of the rotor break manifold

Question 2

Safety Valve FUCNTION

Answer 2

Isolates the blade fold, pylon fold and positioning systems
Vents blade fold system to return for thermal expansion

Question 3

From what electrical signal does the safety valve open

Answer 3

Master power control switch or rotor positioner control switch

Question 4

Pitch lock valve LOCATION

Answer 4

Aft hydraulic compartment, inside the rotor brake access panel

Question 5

Pitch lock valve FUNCTION

Answer 5

Controls pressure to:
Six pitch lock cylinders, Blade fold control valve

Question 6

Blade fold control valve LOCATION

Answer 6

1 blade arm

Question 7

Blade fold control valve FUNCTION

Answer 7

Provides directional control for folding and spreading

Question 8

Pitch lock sequence valve (6) LOCATION

Answer 8

One per sleeve and spindle(except the 1st)

Question 9

Pitch lock sequence valve(6) FUNCTION

Answer 9

When contacted allows pressure to unlock the lower blade lock pin cylinder

Question 10

Blade spread sequence valve (6) LOCATION

Answer 10

1 per sleeve and spindle(except the 1st)

Question 11

Blade spread sequence valve (6) FUNCTION

Answer 11

When the blades are spread, allows pressure to the blade locks to extend