Hydraulic

Question 1

Electric Hydraulic Pumps Automatically turn ON when

Answer 1

1. Flaps > 0
2. TLA to TOGA
3. GS > 50 kts and stays on for 60 seconds
4. ACMP2 when on GRD and ENG 1 is running and Parking Brake is Released
5. ACMP2 when on GRD during ENG 1 Start and Parking Brake has been applied in last 6 min

Question 2

What are 6 Systems that use Hydraulic Power

Answer 2

SNLWTF
SpoIlers
Nose Wheel Steering
Landing Gear
Wheel Brakes
Thrust Reversers
Flight Controls

Question 3

HYD ACMP 1B and HYD ACMP 2B are located on what BUS

Answer 3

ACMP 1B - AC Bus 2

ACMP 2B - AC Bus 1

Question 4

What is Power Transfer Unit (PTU)

Answer 4

A Mechanical Pump that uses HYD 1 Power to provide HYD 2 Pressure

Question 5

When will PTU Auto Activate

Answer 5

If System meets Requirements
1. Flaps > 0 or Landing Gear Not Up and Locked
2. ENG. 1 has NOT Failed
3. HYD 2 Reservoir Fluid Level is above 12%
Then PTU will come on Automatically if:
1. ENG 2 Fails 
    OR
2. EDP 2 Fails

Question 6

When will HYD ACMP 1 or ACMP 2 Activate on GRD or In FLT

Answer 6

GRD

1. Flaps > 0
2. Ground Speed > 50 kts (stays on for 60 secs)
3. TLA set to T/O

FLT

1. ENG or EDP Failure
2. Flaps > 0

Question 7

What is purpose of Accumulators

Answer 7

1. Helps to Maintain Constant Pressure by covering Transient Demand
2. Helps to avoid Cavitation in Reservoir

Question 8

What are 3 basic Components of Hydraulic System

Answer 8

1. Reservoir
2. Pumps
3. Accumulators