Herc Props

Front 1

Manufacturers name and designation of prop?

Back 1

Hamilton Standard 54 H 60-91

Front 2

Prop maintenance manual number?

Back 2

2-11

Front 3

Definition of ground range (coordinator degrees)?

Back 3

0-34° on coordinator

Front 4

Force acting on prop forcing it into fine pitch?

Back 4

CTM

Front 5

Force acting on prop driving it into coarse pitch?

Back 5

ATM

Front 6

Purpose of the stop ring fitted to the rotating cam?

Back 6

Physical stop for feather and max reverse

Front 7

Component in dome that meshes with blade segment gears?

Back 7

Rotating cam

Front 8

What must be done to the prop blades to remove the afterbodies?

Back 8

Must be driven to max reverse position

Front 9

5 prop pumps are?

Back 9

*Main

*Aux

*Main scav

*Aux scav

*Standby

Front 10

What two conditions would initiate a pitch lock?

Back 10

Loss of hyd fluid

Prop going into an overspeed situation

Front 11

4 safety systems that send prop TOWARDS feather?

Back 11

*T handle

*NTS

*Condition lever

*Feather button

Front 12

How are feather latches released when unfeathering the prop?

Back 12

Aux pump px torques the rotating cam out of the feather latches

Front 13

What holds the raked teeth together under pitch lock?

Back 13

Spring px

Front 14

2 methods of keeping pitch lock disengaged during normal operation?

Back 14

Cam out ring

Hyd px

Front 15

Purpose of sump relief valve and its px rating?

Back 15

*Relieves excess px from the pressurised sump back to the atmospheric sump

*20 PSI

Front 16

2 occasions the standby px pump will assist the main px pump?

Back 16

*High demand conditions

*Main pump failure

Front 17

The beta light is displayed where?

Back 17

On the torque indicator

Front 18

2 functions of the manual feather cam?

Back 18

*Disengage NTS in the ground range

*Move the feather valve to the feather positon when the condition lever is moved to that position

Front 19

When will the backup valve be open?

Back 19

Spring loaded shut, opens:

*Below 28° coord with throttle movement

*Above 32° blade angle with Beta feedback system

Front 20

Purpose of 86° px cutout switch?

Back 20

Prevents Aux pump from being terminated early by px surges

Front 21

Precaution to be observed for separating valve housing from pump housing?

Back 21

Pin the Beta shaft

Front 22

2 systems that send the feather valve towards feather?

Back 22

*NTS

*Condition lever (going towards feather)

Front 23

T/F? - The Beta light cam is on the Beta shaft?

Back 23

True

Front 24

T/F? - Valve housings from legacy aircraft can be used on LEP aircraft?

Back 24

True

Front 25

T/F? - legacy aircraft do not have Beta lights?

Back 25

True

Front 26

Purpose of the Beta set cam during normal operation?

Back 26

Sets blade angles in the ground range

Front 27

Angle at which low pitch stops hold the blades?

Back 27

23.25°

Front 28

Where is the low pitch stop assy mounted?

Back 28

In the dome

Front 29

Purpose of the low pitch stops?

Back 29

Prevents the blades reducing pitch into the ground range while the throttle is in the flight range

Front 30

T/F? - NTS light stays illuminated on shutdown with the feather valve check switch in the 'valve' position?

Back 30

False

Front 31

T/F?- The prop blades move to increase pitch on shutdown?

Back 31

False

Front 32

T/F? - The NTS linkage and microswitch in the valve housing are actuated on engine shutdown?

Back 32

True

Front 33

Actions carried out by the prop if NTS is sensed in flight?

Back 33

Coarsens the pitch of the blades

Front 34

T/F? - The condition lever cannot feather the prop if the physical linkage in the coordinater fails?

Back 34

False

Front 35

T/F? - The fire handle physically positions the feather valve?

Back 35

False

Front 36

T/F? - The prop can't be fully feathered if the Aux pump has failed?

Back 36

True

Front 37

Which parts of the spinner is anti-iced?

Back 37

Fwd 7 inches of the nose spinner

Front 38

Which parts of the spinner are de-iced?

Back 38

Everything except the fwd 7 inches

Front 39

How does the propeller govern itself?

Back 39

Flyweights and a pilot valve

Front 40

What procedure must be done after the syncrophasing box has been replaced?

Back 40

Re-index

Front 41

3 valve housing adjustments?

Back 41

*Reverse torque

*Beta schedule

*Mechanical governor RPM

*Beta shaft adjust

Front 42

Precaution to be observed when making reverse torque adjustment?

Back 42

Adjustments must not be made when the blades are at max reverse position

Front 43

Purpose of the pulse generator?

Back 43

Used in conjunction with the magnet on the slip ring assy to send prop RPM and angle signals to the syncrophaser