757 Systems - Hydraulic Flashcards
1
Q
What is the primary purpose of the PTU?
A
The PTU uses right hydraulic power to pressurize the left hydraulic system to assist in operating the
1. Flaps
2. Slats
3. Landing gear and
4. Nose wheel steering
when the left engine driven hydraulic pump (or engine) fails.
2
Q
When might the QRH direct the CA to press the RESERVE BRAKE button?
A
In the event of a right hydraulic leak, a stand pipe preserves a reserve quantity of fluid for use by the normal brake system. Pressing the button opens an isolation valve which allows the reserved fluid to be used exclusively for brakes.
3
Q
When does the RAT deploy?
A
Dual engine failure in flight
4
Q
What does the RAT provide?
A
Operation of the flight controls portion of the center hydraulic system.
