SYS110 Flashcards
What are the four devices operated by the primary hydraulic system under normal operations?
Landing Gear/Main Gear Inboard Doors
Flaps
Speed Brake
Nosewheel Steering
The hydraulic system and the return side of the power package reservoir are pressurized to which levels respectively?
3000 +- 120 psi, and 50 psi
When you select a cockpit control to lower the flaps, which element of the primary hydraulic system is responsible for activating the corresponding actuator?
Electrical Selector Valve
During the loss of engine power, the primary hydraulic system, or the battery bus, the emergency package will allow a one-time extension of the __________.
Flaps, landing gear, and main gear inboard doors.
The emergency package’s manifold contains which of the following?
Two emergency extension selector valves.
What is the purpose of the pressure release valve in the emergency hydraulic system?
To automatically release pressure should it reach 3500 psi.
When the EHYD PX LO light illuminates, it means that emergency acccumulator hydraulic pressure is below ________ +- 150 psi.
2400
Which set of landing gear doors are operated hydraulically?
The main gear inboard doors
A red light illuminated in the landing gear selector handle indicates that the PCL is approaching IDLE, with the gear handle up, or _____________?
The landing gear doors are not closed.
Before extending the landing gear,
reduce the airspeed to below 150 KIAS.
What is the function of the emergency landing gear extension handle?
It activates the emergency hydraulic system for a one-time extension of flaps and gear.
The engine-driven pump pressurizes the hydraulic system to:
3000 +- 120 psi
The primary hydraulic system operates:
The landing gear, the main gear inboard doors, the flalps, NWS, and the speed brake.
What is true about the power package reservoir?
A piston helps step down pressure to protect the pump.
The primary hydraulic system’s selector manifold contains:
Electrical selector valves
Two specific conditions in which the emergency hydraulic system is used are:
Loss of engine power, or primary hydraulic system failure.
The emergency hydraulic system specifically operates:
Landing gear, main gear inboard doors, and flaps.
The emergency package receives its pressure from the:
Emergency accumulator
Before lowering the gear using either the primary or emergency systems, ensure that:
airspeed is below 150 KIAS.
The amber EHYD PX LO annunciator light means that:
Pressure in the emergency accumulator is below 2400 +- 150 psi.
The HYDR FL LO annunciator means:
Reservoir fluid level is below 1 Qt
When the power package slide valve closes, the hydraulic pump pressure is prevented from energizing any hydraulic components except for the
Nosewheel steering actuator.
