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Flashcards in HYDRAULICS Deck (17)
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1

How many HYD has the B787?

3 independents HYD sys each of the at 5000 Psi named : L, R, C

2

Which systems are HYD powered?

FLT CTR

LDG GEAR

REVERSER

LEADING EDGE SLATS

TRAILING EDGE FLAP

NOSE WHEEL STEERING

3

What is powering the L HYD?

FLIGHT CONTROLS

THE LEFT ENGINE THRUST REVERSER

RIGHT AND LEFT WONG SPOILERS

4

WHAT IS POWERING THE R HYD?

FLT CONTROLS

R ENGINE THRUST REVERSER

RIGHT AND LEFT SPOILERS

5

HOW MANY PUMPS WE HAVE IN THE L or R HYD?

2 one PRIMARY and one in Demand.

6

What is the function of DEMAND pumps?

Supporting the PRIMARY pumps in periods of high demands, and ofc been a BACKUP

7

When a DEMAND PUMP comes ON Automatically?

When:
System pressure is LOW

3 min after the second engine starts

From TOGA to flaps up

In approach from 1000ft or gear down to 40 kts on grd

During reverser operations

8

Which SYS are powered by the C HYD?

FLT CTR

LEADING EDGE SLATS

TRAILING EDGE FLAPS

NOSE WHEEL STEERINGS

SPOILERS R,L WING

LANDING GEAR ACTUATION

9

Which HYD systems is powered by the RAT?

The CENTER HYD system is powered by the RAT

10

How many PUMPS has the HYD?

Two electric pumps C1 & C2 ONE acting as PRIMARY and the other one will be on demand

11

When start to operate the PRIMARY CENTER PUMP?

IMMEDIATELY after SECOND engine START

12

When a DEMAND HYD CENTER PUMP starts to work?

When :

System pressure is LOW

For the First 3 min after second engine is started

From take off trust set till 2000ft

Flaps operation

In approach from GEAR DW or 2000ft RA till 60 kts on grd

13

Which additional function has the HYD C system ?

Has an automatic ISOLATION feature for lowering the landing gear, and guarantee a nose-wheel steering during landing and rollout

14

What is a RAT

RAM AIR TURBINE

15

HOW MUCH PSI PROVIDES THE RAT

The RAT PROVIDES 5000 psi to the FLT CONTROL system using the C HYD system

16

Wht is providing the RAT?

Electrical power and HYDRAULIC power

17

When the RAT AUTOMATICALLY DEPLOY?

When:

LOSS OF BOTH ENGINE

LOSS OF ALL HYD

WHEN CAPT AND FO INSTRUMENTS COMPLETE LOSS OF AC POWER

LOSS OF ALL 4 EMP AND AN ENGINE FAILURE OCCURS DURING TAKE OFF

LOSS OF ALL 4 EMP AND FLT CTR FAILURE OCCURS ON TAKE OFF OR LANDING