Hydraulics Flashcards
At the 2-hour point in flight you notice the right side HYD pressure is in excess of 3400 psi with indications of fluid loss. What is the possible cause of the problem?
An engine driven HYD pump malfunction
If the rudder power manual shutoff valve were inadvertently left closed, the ______, _______ and ________ would be deactivated.
APU System
A/R Boom
Powered Rudder
The right hydraulic system cannot be pressurized by the aux pump unless the __________ and _________ are off.
CIPS and Powered Rudder
Who’s brakes incorporate an anti-skid system?
The pilot’s brakes
During flight, you notice the #3 HYD pump inoperative light comes on and the right HYD quantity starts decreasing. What are you actions?
Immediately set the #3 HYD pump supply switch to close
When the left or right HYD pressure switch is set to off, the de-pressurization valve opens, connecting the pressure line to the return line. This reduces available pressure to ______ psi or less.
750
With _____ HYD system failure and _______, pull the anti-skid inboard breakers.
Left, only reserve brake pressure available for braking
Simultaneous operation of the ________ and __________ will result in slow operation of the gear and reduced climb out performance
Forward A/R pump and Landing gear
Left and Right HYD system pre-load pressure is approximately _______ psi @ 70F.
2000
Max speed for gear extension/retraction is ________ below 38,000ft. Max airspeed with gear extended is _______ below 30,500ft.
270; 320
The following conditions would prevent the landing gear from retracting normally.
Nose gear wheels not centered
Landing gear lever lock CB popped
Landing gear trucks not level and oleos fully extended
In the AUTO position, an auxiliary HYD pump will automatically go off when system pressure reaches ________, and comes on when the pressure drops to between 200 psi below this value and _________ psi.
2900 +/- 150, 2400
In the AUTO position, an auxiliary HYD pump will automatically turn on when system pressure reaches approximately ________ psi.
2400
With the left system auxiliary HYD pump switch held in Reserve Brake and with the battery power switch in NORM or EMER, electrical power is drawn directly from the _______.
Battery
In order to stop main wheel rotation during gear retraction _____.
HYD Pressure is automatically directed to the main gear brakes
Simultaneous operation of the landing gear and the ________ will cause slower gear retraction and reduced climb out performance
Forward A/R pumps
The normal main HYD system pressure range ______ psi.
2400-3050
Landing gear retraction on the ground is prevented because the main gear ______ are not extended
Oleos
In order for the nose gear steering to operate, the _____ HYD system must be pressurized
Right
Pulling the ____ bypasses the lock solenoid and allows the gear to be retracted regardless of the position of the safety switches
Override trigger
In order for the Left HYD system pressure to be built up using the AUX pump the ________.
Inboard spoiler must be cutoff
With only Reserve Brake pressure available to stop the aircraft and a fully charged Reserve Brake system, approximately _______ applications of the pilot’s brake will deplete the reservoir brake pressure.
3
Normal Reserve Brake pressure is _______ to _______.
1300 to 3050
Prior to pressurizing the Left HYD system while on the ground, the pilot must ensure ______.
No personnel are standing near the wheel well doors
When towing the airplane, de-pressurize the Right HYD system and ___.
Do not turn or hold the steering wheel
Normally the AUX pumps are off during flight because ________.
They draw fluid from the main system return lines
The rudder power manual shutoff valve must be open prior to flight since it is _____.
Not accessible during flight
The HYD pump supply shutoff valve can be controlled in the cockpit by the _____ or ______.
Engine fire switches, HYD pump supply switches
Placing the HYD pressure switch to the on position _______.
Closes the HYD depressurization valve
The _____ pump is used as an alternate source of pressure for the pilot’s brakes
Left Auxiliary
The HYD fluid reservoir should be considered empty when the gauge indicates approximately _______.
1 gallon
A _____ will be indicated on the left HYD system indicator gage after the landing gear is retracted.
Drop of approximately 1 gallon
The only component that can be crossed over from the left HYD system to the right HYD system is the ______.
Landing Gear
If the Reserve brake pressure gage indicates 1300 psi, with the left HYD system depressurized, _____ brake application(s) will be available
1
The HYD pump inoperative lights will flash _____.
Prior to engine start or anytime the system is depressurized
When using the left AUX pump to recharge the Reserve brake system, the HYD fluid supply is drawn directly from the _____.
Main system return lines
Which components normally powered by the Right HYD system can be operated by either HYD system by use of the cross over valve
Boom Controls
Main Flaps
APU Start System
Power Rudder
The HYD quantity gauge for each system should indicate ______ after engine start
A minimum of 4.0 gallons
Do not approach overheated brakes for ______ minutes
30
Premature retraction of the landing gear after takeoff may cause the aircraft to _____ since open gear doors increase drag.
Settle
When the nose gear steering fails, the aircraft should ______.
Only be taxied as necessary to clear the active runway
With the Reserve Brake system fully charged, and the Left HYD system depressurized, enough pressure is available for approximately ______ applications of the pilot’s brakes
3
After the final turn to line up with the parking spot, the aircraft should be taxied in a straight line for a short distance to _______.
Eliminate torsional loads on the main gear
A Solenoid lock in the gear handle will not allow the landing gear to be raised unless both main gear trucks are level, both main gear oleos are extended, and ____.
The nose gear is centered
HYD pump isolation in excess of ____ can result in self-destruction of the pump.
5 minutes
The landing gear position indicators display the _____ position when electrical power is lost.
Intermediate
The anti-skid system can cycle as fast as ____ cycles per second, causing loss of accumulator pressure in a very short time
3
Reserve Brake accumulator pre-load pressure is approximately ____ psi @ 70F
1000
It is safe to use the crossover valve after loss of fluid from either system provided ______.
Pressure can be built up and maintained in the affected system with the appropriate HYD pressure and AUX pump switches on
The crews first directed action for a problem of Low HYD pressure with no other indications is to _______.
The crews first directed action for a problem of Low HYD pressure with no other indications is to _______.
In the event of a complete failure of a HYD system or leak that cannot be controlled ______.
Land as soon as practicable
What is the purpose of the hydraulic accumulators?
Protect hydraulic components against sudden pressure surges.
Nosewheel steering is normally limited to _____________ degrees with the steering wheel and __________ degrees when using the rudder pedals
45, 8
Both the red landing gear warning light knob and the warning horn come on ____________.
if one or more throttles is retarded to near idle and any gear is not down and locked
Do not pressurize the reserve brake above ___________ when the parking brake is set; check valves will dump fluid overboard
3,100 psi
What prevents an accidental collapse of the landing gear while the airplane is on the ground?
External ground safety locks
Without using the position indicators in the cockpit, how do you know the gear’s position?
Alignment stripes, truck level indicators, oleo extension indicators
An electrically driven pump in each system supplies hydraulic pressure for emergency use and for brake operation during ground operation and handling. (True or False)
True
With inoperative rudder pedal nosewheel steering, the pilot in the left seat will keep his/her hand on the tiller until reaching ____________.
Vmcg + 20
When setting parking brakes for engine start, pressurize the reserve brake accumulator until a pressure increase of at least __________ psi above preload pressure is observed.
300
If both landing gear safety switches fail to the airborne position, the engines will remain in flight idle, the _________ will not operate normally, and the rudder pedal nosewheel steering will be inoperative
Pilot’s brakes
