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43 Cards in this Set

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What is the normal and alternates pump for hydraulic system 1
Normal=engine driven
Backup=Electrical
What is the normal and alternates pump for hydraulic system 2
Normal=Engine
Backup=Electrical
What is the normal and alternates pump for hydraulic system 3
Normal=Electrical A
Backup=Electrical B
Can we disable the engine driven hydraulic pump
Yes, by using the guarded engine pump shutoff
What does the ON position do on the hydraulic systems 1 & 2 ELEC PUMP knob
Operate the electric pump continusly
What does the AUTO position do on hydraulic systems 1 & 2 ELEC PUMP knob
Operate the electric pump automatically
Hydraulic system 2 powers the nose wheel steering. How then can we do a single engine taxi with just the #1 engine operating
Releasing the emergency parking brake will cause the #2 system electric pump to come on, which will also supply a full set of brakes
Hydraulic system 3 has two electric pumps with two control knobs. Electric pump B control knob has an AUTO position with the electric pump and A does not. Why
Electric pump B acts as a backup in the auto position and will come on automatically if electric pump fails.
How can you turn on the PTU
By putting the knob to ON
With the PTU control know in the AUTO position when will the PTU turn on
When the engine driven hydraulic pump in system 2 fails and the gear is selected up or down
What hydraulic fluid does the PTU use
It uses the hydraulic power from system 1 to pressurize the fluid in system 2
Where would you find the status of the entire hydraulic system
MFD Hydraulic system synoptic page
What systems use Hydraulic system 1
1.Elevator-Left hand outboard
2.Rudder-Upper actuator
3.Thrust reverser-Eng 1
4.Mulit function spoilers-Left and RT panels 3 and 4
4.Ground spoilers-Left and right panel 2
5.Out board brakes
Emergency parking brake
What systems use Hydraulic system 2
1.Elevator-left and right inboard
2.Ailerons-Left and right inboard
3.Thrust reverser-Engine 2
4.Multi function spoilers-left and right panels 5
5.Ground spoilers-left and right panel 1
6.inboard brakes
7.Nose wheel steering
8.Landing gear
9.Emergency parking brake
What systems use hydraulic system 3
1.Elevator-rt hand outboard
2.Rudder-lower actuator
3.Ailerons-left and right outboard
What would you expect the FADEC to do with hydraulic system 1 and 2 in the event of an engine flameout
The FADEC logic would depressurize the respective engine driven hydraulic pump in order to reduce torque loads on the engine to help facilitate a windmill start
Explain how the two dedicated valves in hydraulic system 3 work during an electrical emergency
Pump Unloader Valve-Reduces the discharge pressure of hydraulic pump A in system 3 during its start up. This reduces pump torwue and reduces electrical powere required to start the pump

Flow Limiter Valve-Reduces the amount of flow provided by electric pump A in system 3. This limits the electrical power that the pump can draw and prevent the hydraulic pump from stalling the RAT
What are the two dedicated valves in hydraulic system 3
Pump Unloader Valve
Flow Limiter Valve
What provides hydraulic power for system 3 during an electrical emergency
The system 3 accumulator will provide hydraulic power to the associated flight controls from the beginning of RAT deployment until the AC ESS BUS powers the ACMP 3A
How many hydraulic systems does the 170 have
3 independent
How many pounds of pressure does the engine driven hydraulic pumps provide
3000 PSIG @ 19.0 GPM
How many hydraulic pumps does the 170 havE
2 engine driven
4 electric
How many pounds of pressure does the electric pumps provide
2700 PSIG @ 3.7 GPM
What type pumps are located in hydraulic system 3
Electic pump A-Normal
Electric pump B-Backup
What powers electric pump on hydraulic system 1
AC BUS 2
What powers the electric pump on hydraulic system 2
AC BUS 1
What powers the electric pump on hydraulic system 3 pump A and pump B
Pump A=AC ESS BUS
Pump B=AC BUS 2
When will the PTU come on if in AUTO mode
Failure of the engine driven pump in hydraulic system 2 and the gear raised or lowered
Where are the accumulators and what do they do
All three systems and they prevent pump cavitation
Where are the engine driven pumps of hydraulic system 1 and 2 loacted
On the respective accessory gear box of each engine
What hydraulic system is the emergency parking brake located on
1 AND 2
What hydraulic system is the landing gear located on
2
What hydraulic system is the nose wheel steering located on
2
How will hydraulic system 3 receive power with an AC electrical failure
RAT will power hydraulic system 3A pump
How does the PBIT test work for the hydraulic system
Upon AC power up an electronic PBIT test will be performed for 3 minutes followed by a 1 minute hydraulic PBIT test for the flight controls
How long are the electronic and hydraulic flight control PBIT test good for
20 hours
During take off what hydraulic pumps are on
Both engine driven pumps and if the flaps are out of the 0 detent hydraulic system 1 and 2 electric pumps
When will the electric pumps for hydraulic system 1 and 2 turn off after takeoff
When flaps have been retracted
What is the purpose of the flow limiter valve
To reduce fluid flow so the RAT can spin up faster. When RAT is spun up system will return to normal pressure
When will hydraulic system 1,2, or 2 shutdown automatically
Temp above 125 degrees
What pumps are used during climb,cruise,and descent
Engine driven 1,2 and Electric 2 A
How long after landing will the electric pump fro system 1 and 2 remain on for
1 minute
During cold winter operstions when is a hydraulic system warm up required
First flight of the day if temps overnight below 18 C