Hydraulic Systems

Question 1

The purpose of the PTU is to provide Hydraulic System B fluid at a flow rate (approximately 6.5 GPM) and pressure sufficient to provide normal rates of operations for the ______ and ______ in the event the Hydraulic System B Engine-Drive Pump output press drops below a specific value.

Answer 1

Autoslats
Leading Edge Devices (LED)

Question 2

When is the automatic operation for Standby Hydraulic System initiated?

Answer 2

When flaps are extended, airborne, or wheel speed greater than 60 kts, and loss of System A or B while FLT CONTROL switch positioned to ON - OR - the main PCU Force Fight Monitor (FFM) trips.

Question 3

What pressurizes both System A and System B hydraulic reservoirs?

Answer 3

Regulated Bleed Air

Question 4

When do the letters RF (white) appear?

Answer 4

REFILL (RF) indication is displayed (white) when hydraulic quantity is below 76%. Valid only when aircraft is on ground with both engines shutdown or after landing with flaps up during taxi-in.

Question 5

How do you display the Hydraulics in the MAX?

Answer 5

MFS SYS Button