A320 Hydraulic System
Green, blue and yellow with the PTU and the RAT. Fail a pump or lose power and see what each user keeps.
Click an engine, a pump, the PTU or the RAT to change it. Values are simplified.
Scenarios
What still works
Test yourself
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Practise the questions
Hydraulics12 questionsFlight controls16 questionsLanding gear and brakes12 questionsWhat to try
- Run the scenarios one by one and watch the table of users: normal, reduced (one of two sources lost) or lost.
- Click an engine or a pump to switch it. Notice which users depend on a single system.
- Switch the PTU off and fail an engine: the green system has no way to recover pressure.
- Try the Total AC loss scenario to see the RAT come out and what blue alone can power.
Exam point
Green: engine 1 pump. Yellow: engine 2 pump and an electric pump. Blue: an electric pump, and the RAT in an emergency. The PTU lets green and yellow power each other without moving fluid. Normal brakes are green, alternate brakes and the parking brake are yellow. Check the surface allocation in your own FCOM.
Study aid only. This is original teaching material, not Airbus or Boeing documentation. Layouts, values and procedures are simplified and can differ by aircraft version and operator, so always check your FCOM, QRH and course notes.