Hydraulics Flashcards
•In AUTO, what will cause the PTU to operate?
•What is the PTU’s Primary purpose?
Low Pressure in System 2
• A failure of ENG 2 or
• A failure of ENG 2 Engine Driven Pump
Provides normal Gear Extension in the even of one of these failures.
When Will PTU operate in AUTO mode?
Sys 2 pressure is insufficient to Operate Gear
In Flight
•When does Hydraulic ELEC Pump #2 automatically Run?
During Landing with Flaps greater than 0°
If Low Pressure is detected.
When does Hydraulic ELEC Pump #2 automatically Run?
On Ground
In Flight
On Ground
1.) During Takeoff Roll
•Flaps > 0
•Thrust Levers Advanced, or
•GS > 50kts
2.)OET parking break Released
In Flight
1.) During Landing
•Flaps > 0
2.) If Low Pressure is Detected
When Does Hydraulic ELEC PUMP #2
Automatically run when on the ground?
1.) During Takeoff with
• Flaps >0
• Thrust levers Advanced or
• GS > 50Kts
2.) During OET with Parking Break Released.
During TAXI
Will the Failure of ELEC PUMP 3A command ELEC PUMP 3B to come ON automatically??
No, In Flight only when low pressure is detected
In AUTO, when will the SYS 3 ELEC PUMP B Turn on?
Only In Flight, when low pressure is Detected.
How could you manually isolate an EDP from the Hydraulic System?
•Pushing in SYS 1 or 2 ENG PUMP SHUTOFF button. Which closes the Hydraulic SOV isolating the Respective EDP from its Hydraulic System.
• or pulling associated Fire Handle.
When would SYS 1 OR 2 ELEC PUMP operate automatically In Flight?
Failure of its associated EDP
Or Flaps are not Zero.
In AUTO, When would SYS Electric Pump 3B come on?
In Flight Only when SYS 3A ELEC PUMP Fails.
When Will PTU operate in AUTO Mode?
SYS 2 pressure is insufficient to operate gear.
When would SYS 1 or 2 ELEC PUMP Operate automatically in flight?
•Failure of its associated EDP
Or
•Flaps not 0
