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WorksheetsATR 72-600 (Hydraulics)
Total questions: 27
Worksheet time: 14mins
An amber HYD AUX OVHT message indicates:
Overheat of the fluid in the blue auxiliary hydraulic pump return line
Overheat of the fluid in the blue reservoir
Overheat of the blue auxiliary hydraulic pump
The DC auxiliary Pump will start operating...
If the blue main pump output pressure dropped below 1,800 psi
If the blue main pump output pressure dropped below 2,100 psi
If the blue main pump output pressure dropped below 1,500 psi
The HYD AUX PUMP pedestal pushbutton works on the ground with the battery switch OFF.
True
False
Each hydraulic system is mainly pressurized by means of:
An ACW electrical pump
An engine-driven pump
An alternate pump
The components supplied by the blue hydraulic system include:
Nose wheel steering, flaps, spoilers, propeller brake for the right engine, emergency and parking brakes
Nose wheel steering, flaps, spoilers, propeller brake
Flaps, spoilers, propeller brake, emergency and parking brakes
Landing gear, emergency and parking brake
The components supplied by the green hydraulic system include:
Nose wheel steering, landing gear, and normal brake
Landing gear, normal brake, and parking brake
Parking brake
Landing gear and normal brakes
Where is the sensor for the OVHT light?
On the pump drain cases
In the supply lines feeding each pump
In the reservoir
On the return line
What is the normal main hydraulic pump output pressure for the blue hydraulic system?
1,500 psi
2,200 psi
3,000 psi
800 psi
The hydraulic fluid is contained in:
A single common unpressurized tank, located in the hydraulic bay (left landing gear fairing)
Two separate tanks (blue in the left landing gear fairing, green in the right landing gear fairing)
A single common pressurized tank, located in the hydraulic bay (right landing gear fairing)
The auxiliary hydraulic pump runs automatically when blue system pressure drops below _______, the propeller brake is released, the gear handle is down, and at least one engine is running.
3,000 psi
1,500 psi
800 psi
If the auxiliary pump is operating:
The auxiliary pump will continue running for 15 seconds after the prop brake is engaged.
The AUX PUMP pedestal switch has to be pressed in order to pressurize the blue hydraulic system
The auxiliary pump runs automatically for two minutes
On the ground, pushing the AUX PUMP pushbutton (located on the pedestal):
Pressurizes the green hydraulic system
Energizes the auxiliary pump, provided the battery switch is in the ON position
Energizes the auxiliary pump, which pressurizes the blue hydraulic system, regardless of whether the battery switch is in the ON or OFF position
Which of the following statements is correct when you have a BLUE HYD lo lvl plus GREEN HYD OVHT indication?
All answers are correct.
Both of the systems are lost if the OVHT light is not extinguished.
The flaps will remain at the present position.
The BLUE system is lost and the GREEN system could be recovered if the OVHT light is extinguished
Which of the following statements best describes the ATR 72-600 Hydraulic System?
ATR 72-600 has 3 hydraulic systems, green, yellow and blue.
ATR 72-600 has three hydraulic systems, Red, Green and Blue.
ATR 72-600 has 2 hydraulic systems, Green and Blue.
ATR 72-600 has two hydraulic systems, Red and Blue
Identify the users of the ATR 72-600 Green Hydraulic System.
The landing gear and flaps
Nose Wheel Steering
The landing gear and normal braking
The spoilers and normal braking
The OVHT light illuminates AMBER in the overhead panel when Pump Case drain line OVHT temperature is detected above:
300 ° Celsius
121 ° Celsius
500 ° Celsius
250 ° Fahrenheit
What happens if one of the main hydraulic pumps fails?
The associated users may be supplied by the other main hydraulic pump using the cross-feed.
The associated users are lost with no option to be recovered.
The cross-feed valve is automatically inhibited.
The cross-feed valve opens automatically.
Regarding the Auxiliary pump pb switch operation, choose the correct answer:
The Auxiliary Pump cannot be operated when all engines are running.
The auxiliary pump pb switch operates even with the battery Master switch in the OFF position.
The auxiliary pump must be always operated with engines OFF.
The auxiliary pump can only be operated with the battery switch in the ON position
What is the total fluid volume in the HYD tank?
9.6 litres
8.5 litres
8.5 gallons
9.6 gallons
Which of the following statements best describes the Hydraulic System in case of a total Hydraulic System loss?
Landing distance is increased.
If a go-around must be performed, the landing gear will not retract.
The emergency accumulator will be needed to be used after landing.
All answers are correct.
Which of the following statements is correct in case of HYD overheat?
If the OVHT light is extinguished, you can try to recover the system after 2 minutes.
Attempting to restore the system could damage the pump.
You can attempt to restore the system after the indications have been extinguished.
All answers are incorrect.
How can we energize the ATR 72-600 Hydraulic System when no electrical power is available on ground?
With a pb located in the overhead panel
With the auxiliary pump pb located on the pedestal or a pb in the overhead panel
With a ground power unit or with the auxiliary pump pb located on the pedestal
With a hand pump close to the gear bay
Which is the best option to choose when having a low lvl indication on the GREEN system?
Recover the system by using the auxiliary pump pb.
Lose the flaps and apply the reduced flaps landing procedure.
Extend the landing gear by gravity, multiply the lndg distance by 1.5, and use the emergency braking after landing
After confirming a low lvl indication but with no leak, the system can still be normally used.
How are the ATR 72-600 Hydraulic Systems pressurized?
Each by an ACW electrical motor driven pump
By the bleed air coming from the engines
By a DC electrical pump
All answers are incorrect
What is the normal position of the hydraulic cross-feed valve pb?
Pressed in when in Normal operation.
Pressed in or released makes no difference.
Pb released
Pressed in so it can be automatically operated
What happens if the ATR 72-600 Hydraulic System detects a leak?
The cross-feed valve opens automatically.
The hydraulic cross-feed valve operation is not inhibited and we must close it manually.
The hydraulic cross-feed valve operation is inhibited and closes automatically, if it was previously open.
The hydraulic cross-feed valve remains half open waiting for manual confirmation by the crew.
Identify the users of the ATR 72-600 Blue Hydraulic System.
All answers are incorrect.
The wing flaps, two spoiler actuators, the nose wheel steering, the propeller brake and the emergency and normal brakes
The wing flaps, two spoiler actuators, the nose wheel steering, the propeller brake and the emergency and parking brake
The wing flaps, two spoiler actuators, the Nose wheel steering, the propeller brake, the emergency braking and landing gear
