2A651 Volume 4

1. Which 54H60-91 propeller subassembly transmits engine torque to the propeller baldes?

Barrel

Control

Low pitch stop

Pitchlock regulator

2. The purpose of the 54H60-91 pitchlock assembly is to prevent?

The loss of oil pressure

An engine overspeed due to a loss of power

The flow of hydraulic fluid to the pilot valve

An engine overspeed due to a loss of hydraulic pressure

3. On the 54H60-91 propeller, which component delivers the actual propeller blade angle from the blade to the control assembly?

Microadjusting ring

Beta feedback shaft

Blade segment gear

Blade bushing

4. On the 54h60-91 propeller which component provides a means for balancing the propeller?

Deicer contact ring holder

Hub mounting bulkhead

Front spinner

Afterbody

5. On the 54H60-91 propeller which pitchlock component mechanically holds the stationary and rotationg pitchlock ratchets apart during reversing and unfeathering operations?

Pitchlock control cam

Pitchlock ratchet piston

Externally threaded ring

Externally splined spacer ring

6. On the 54h60-91 propeller what function is a task of the low pitch stop assembly?

Prevents the propeller from going into the beta range when the throttle is positioned in the alpha range

Limits cam travel and prevents the propeller from exceeding feather and reverse angles

Prevents the blades from decreasing pitch if an overspeed condition occurs

Transmits engine torque to the blades

7. On the 54h60-91 propeller which valve contained in the valve housing controls the flow of hydraulic fluid to and from the dome assembly?

Standby

Feather

Backup

Pilot

8. The 54h60-91 propeller governor speeder ring tension positions the pilot valve to maintain what percent rpm in the beta range?

99-103%

104-108%

109-113%

114-118%

9. The condition lever GND STOP position is only effective on the ground because the circuits made in this position are completed through what switches?

Landing gear touchdown

Low speed ground idle

Landing gear warning

Air start

10. What component in the T56 engine coordinator provides refrence signals to the electronic TD amplifier that are proportional to the desired TIT?

Feather shaft

Potentiometer

65 degree microswitch

66 degree microswitch

11. On the 54h60-91 propeller which component is used in place of a shim plate on the No. 1 blade?

Beveled thrust washer

Stationary ratchet

Beta segment gear

Blade barrel shim

12. On the 54h60-91 propeller what prevents engagement of the stationary and rotating ratchets at blad eangles below 25 degrees and above 55 degrees?

An overspeed of 103.5%

The pitchlock control cam

A loss of hydraulic pressure

Increase or decrease pitch pressure

13. On the 54h60-91 propeller what is the function of the differential gear train assembly?

Drives the main and standby pressure pumps

Controls operation of the pilot valve and serves as an electrical ground

Drives the rotating sleeve when the throttle is positioned in the beta range

Transmits blade angle movement to the valve housing and drives the propeller governor flyweights

14. On the 54h60-91 propeller when throttle is moved to the GROUND IDLE position what degree setting does the coordinator pointer indicate on the protracter?

0

18

34

90

15. On the 54h60-91 propeller hydraulic fluid is directed from the pump housing to the barrel assembly through what component?

Valv housing

Low pitch stop

Transfer bearing

Pitchlock regulator

16. On the 54h60-91 propeller which pump assists the main pressure pump when large blade angle movements are required?

Main scavenge

Standby pressure

Auxiliary pressure

Auxiliary scavenge

17. What switch located in the control quadrant activates the 54H -60-91 propeller governor speed bias servo assembly as the throttle is moved into the flight idle gate?

Beta indicator

Landing gear warning

Low speed ground idle

Synchrophaser disarming

18. On the 54h60-91 propeller which cam disarms the NTS system linkage when the throttle is positioned in the beta range?

Manual feather

Beta follow up

Speed set

Beta set