Gulfstream V Systems Review
HYDRAULICS
- The __________ systems provide the majority of the hydraulic functions thus it has the largest quantity of the two systems.
- Left
- Is the respective hydraulic system shutoff when the fire handle is pulled?
- Yes
- Where is the hydraulic shutoff valve?
- Tail compartment between the reservoir and the hydraulic pump
- How is the hydraulic fluid cooled?
- Heat exchanger located in the fuel hopper
- What is function of the engine drive pump depressurization system?
- To reduce the pump load on the engine during restarts. reduces output pressure to 600 - 1000 PSI.
- When does the engine driven depressurization system operate?
- When the fadec senses the wow system is in air mode, hp speed is less than 35%.
- What are the pressurized right and left system maximum quantities?
- 1.6 and 4.8 gallons
- What is the left and right accumulator pre-charge?
- 1200 PSI at 70F
- What is the only hydraulic source for closing the main entrance door and for charging the parking/emergency brake accumulator?
- Aux pump
- The L sys reservoir is divided into two chambers. what is the capacity of the aux side?
- 2 gallons
- What bus provides operating power to the aux pump?
- Battery tie bus. (Note: book is somewhat misleading. Control power is from the L ess DC bus, operating power is from the batt tie bus)
- When the aux pump is armed, when will it automatically come on?
- When L sys and PTU pressure drop below 1500 PSI and any brake pedal is depressed more than 10 degrees
- Must the batteries be on for the ground service valve to work?
- Yes
- With the external battery switch on, what does moving the ground service valve due?
- Permit fluid to flow to the landing gear and doors, and activates the aux pump
- Name three locations we can close the main entrance door?
- Door close switch on the cop, main cabin door switch on the system monitor test panel one leer, outside door switch on the forward external switch panel
- The PTU receives its motive power from the _____________ hydraulic system.
- RIGHT HYDRAULIC SYSTEM
- What left system components does the PTU power?
- Flaps, nws, brakes, landing gear/doors, HMG
- What insures the aux pump receives positive pressure if the inlet pressure drops below 25 PSI?
- Aux suction boost pump
- What protects and will shut off the PTU motor for excessive flow rates?
- A hydraulic fuse
- When armed the ptu will automatically come on when the L sys pressure is below ______ PSI , L sys reservoir is above ______ gallon(s) and the R SYS reservoir temp is less than 220 F.
- 1500 PSI, one gallon
- Can you manually override an automatic shutdown of the PTU. if so, how?
- Yes, by pushing the "on" switch to on.
- When the main door is closed manually, what subsequent danger is created?
- No fluid in door actuators to dampen door free fall. Warning signs shall be placed on the outside of door to warn personnel
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