ELECTRICAL SYS Flashcards Preview

BOEING 787 > ELECTRICAL SYS > Flashcards

Flashcards in ELECTRICAL SYS Deck (31)
Loading flashcards...
1

WHICH SYSTEM POWERS THE ELECTRICAL SYS OF THE B787?

ENGINE START

PRESSURIZATION

WING ANTI-ICE

STABILIZER TRIM

WHEEL BRAKE SYSTEM

2

WHICH TYPE OF FREQUENCIES IS THE ELECTRICAL SYSTEM USING?

PRIMARLY 115VAC ,28 DCV AND SOME LIMITED NUMBER OF SYSTEMS USING 235 Vac

3

WHAT ARE THE ELECTRICAL POWER SOURCE IN ELECTRICAL SYS?

4 VFSG (VARIABLE FREQUENCY STARTER/GENERATOR)

2 VFSG APU

3 EXT POWER RECEPTACLE

1 RAT

MAIN BATTERY

APU BATTER

3 FLIGHT CONTROL PMG (PERMANENT MAGNET GENERATOR)

2 EEC PMA

4

HOW MANY VFSG HAS EACH ENGINE?

2 EACH OF 235 VAC

5

WHICH SOURCE CAN PROVIDE ELECTRICAL POWER TO START THE ENGINE?

APU,EXT POWER OR OTHER ENGINE RUNNING

6

HOW CAN BE DISCONNECTED EACH VFSG IN THE ENGINE?

AUTOMATICALLY OR MANUALLY, ONCE DISCONNECTED ONLY ENGINEER CAN CONNECT IT AGAIN

7

WHAT THE APU GENERATORS CAN PROVIDE?

ELEC POWER ON GROUND AND IN FLIGHT

8

HOW MANY VFSG HAS AN APU?

2

9

WHO CAN POWER THE START OF THE APU?

EXT POWER, APU BATTERY OR ENGINE GENERATED POWER.

10

WHICH GENERATOR IS USED TO START THE APU WHEN USING APU BATTERY?

THE RIGHT GENERATOR ONLY

11

How many EXT power receptacles are installed on B787

Total of 3, two FWD and 1 in the AFT

12

When GROUND HANDLING mode is energized ?

Only one connection required to power this mode

13

TO POWER THE ENGINE START HOW MANY kVA ARE REQUIRED?

90 Kva

14

HOW TO START THE ENGINE USING EXT POWER?

EITHER USING THE FWD 2 ONLY AND IN THIS CONFIGURATION ANY ENGINE CAN BE STARTED FIRST OR USING 3 CONNECTIONS BUT IN THAT CASE THE RIGHT ENGINE MUSTBE STARTED FIRST.

15

HOW MANY STARTED GENERATORS ARE USED TO START THE ENGINE IN EXT PWR?

1 VFSG IS USED

16

WHEN THE RAT DEPLOY AUTOMATICALLY IN FLIGHT?

LOSS OF BOTH ENGINE

LOSS OF ALL THREE HYDRAULICS

LOSS OF ELECTRIC POWER OF CPT AND FO INSTRUMENTS

LOSS OF ALL 4 EMP AND A FAULTS OCCURS ON THE FLIGHT CONTROLS SYS ON APPROACH

LOSS OF ALL 4 EMP AND ENGINE FAILS IN TAKE OFF OR LANDING

17

THE MAIN BATTERY SUPPLY POWER TO?

AIRPLANE POWER UP

APU START (ASSIST APU BATTERY)

REFUELING OPERATIONS

TOWING OPERATIONS

ELECTRIC BRAKING (AS BACKUP)

CPT FLIGHT INSTRUMENTS (UNTIL RAT DEPLOYMENT)

18

APU BATTERY ON GROUND PROVIDES POWER TO?

APU START

NAVIGATIONS LIGHTS

19

WHICH PROTECTION SYSTEMS IS PROVIDED FOR THE BATTERIES?

AN OVERCHARGING OF FAULT MONITORING SYSTEM IS PROVIDED TO STOP CHARGING OR ISOLATING THE BATTERY IF NECESSARY.

20

IF EITHER BATTERY EXPERIENCES A SEVERE FAILURE WHAT WILL HAPPEN?

HEAT AND GASSES WILL BE DISCHARGED OVERBOARD

21

HOW MANY PMG (PERMANENT MAGNET GENERATOR) ARE INSTALLED IN B787

TOTAL OF 3

22

WHICH SYS THE PMG ARE POWERING?

FLIGHT CONTROLS ELECTRONICS

23

WHICH IS A SECONDARY POWER SOURCE FOR THE FLIGHT CONTROLS SYSTEM?

28 VDC BUS DISTRIBUTION SYSTEM AND MAIN BATTERY

24

HOW MANY PMA (PERMANENT MAGNETIC ALTERNATORS) ARE AVAILABLE ON B787?

2 ENGINE DRIVE PMA

25

WHAT THE PMA ARE POWERING?

EEC

26

WHICH IS A SECONDARY POWER SOURCE FOR THE EEC?

THE 115 VAC BUS DISTRIBUTION SYSTEM

27

HOW MANY RPDU WE HAVE ON BOARD?

17

28

HOW MANY 235 VAC BUSES WE HAVE ON BOARD?

4 MAIN BUSSES L1 L2 R1 R2

29

ON GRD FROM WHICH SOURCE THE BUSSES ARE ENERGIZED?

IF ONLY EXT POWER IS CONNECTED , FROM THE 115 VAC BUS SYSTEM, IF APU IS ON FROM THE APU 235 VAC

30

WITH APU AND ENGINE RUNNING HOW THE 235 VAC BUSSES ARE POWERED

2 EACH