Hydraulic System Flashcards
Why does the T-38C aircraft have two hydraulic reservoirs?
To allow for two independent hydraulic systems
Which components are run by the right hydraulic system?
Flight controls
Which components are run by the left hydraulic system?
- Flight controls
- Speed brake
- Flaps
- Nosewheel steering
- Stability augmenter system
- Landing gear extension and retraction
What are the minimum, normal range, and maximum hydraulic system pressure limitations?
Min - 1500 psi
Normal range - 2850-3200 psi
Max - 3200 psi
When will the hydraulic caution light illuminate?
When the hydraulic pressure drops below 1,500 ps
Can you maneuver the T-38C with the left engine frozen and the right gearbox failed?
No, immediate ejection is recommended
What is indicated by left hydraulic and left generator lights illuminating at the same time?
Gearbox failure
True or false: If the gearbox fails to shift, you lose the generator and hydraulic system on that side
False
If the left airframe mounted gearbox shaft shears, can the gear be lowered normally?
No, the gear must be lowered with the alternate system
Which trim system requires the stab augmenter system to be on?
Rudder trim
What are the conditions that activate the landing gear up warning system when the gear is not down and locked?
- Airspeed 210 KCAS or less
- Both throttles below 96% RPM
- Altitude 10,000 feet or below
What are the conditions that activate the landing gear down warning system?
- All gear are down and locked
- 230 KCAS or more
What are the limits of rudder deflection with nose gear extended ¾ or less?
6°
What are the limits of rudder deflection with nose gear extended more than ¾?
30°
How is control of the speed brake transferred from one cockpit to the other?
- The rear cockpit can take control any time the rear switch is actuated
- The front cockpit switch must be momentarily returned to neutral (OFF) to regain control
If the gear is lowered by the alternate release handle with the landing gear handle in the LG UP position, there will be a red light in the gear handle without the audible tone. What does this indicate?
This is a proper indication and indicates the gear doors are open
If you have AC electrical failure, will this affect the flight controls? If so, why?
Yes. Trim is AC-powered
What hydraulic operations are no longer available if the alternate gear extension is used?
Nosewheel steering inoperative. (After gear extension, landing gear doors remain open.)
The left engine is flamed out and frozen. Can rudder trim be used during the single-engine approach?
No (Rudder trim requires stab-aug on, which requires utility hydraulics.)
True or false: The T-38 wheel brake system is an Independent, self-contained hydraulic system
True
Because of utility hydraulic failure, the gear has been lowered by the alternate gear release. What is still available to the pilot?
Wheel brakes
How are aerodynamic forces transmitted from the flight control surfaces to the pilot?
Aerodynamic forces are simulated by artificial feel
What is the red light in the gear handle used to indicate?
In the up position, the light is a function of the gear doors, and in the down position, the light is a function of the gear position
What does the takeoff trim button do?
Trims only the horizontal tail, and the takeoff trim light illuminates only when the button is pressed and the horizontal tail is trimmed for takeoff
What will happen if one of the flap motors fails?
Both flaps should extend because of the interconnecting rotary shaft
True or false: If you lost the utility hydraulic system, you will still be able to lower the flaps
False
How does AC and DC power failure affect flap operations?
- They will be inoperative only with AC power failure
- They will be inoperative only with DC power failure
What would happen on an aircraft if the flap-slab interconnect failed while the flaps were full down?
The aircraft would have a definite pitchup
