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Boeing 737 > Systems > Flashcards

Flashcards in Systems Deck (43):
1

What doors are on overhead doors panel

Fwd and aft entry
Fed and aft service
Left and right fwd over wing
Fwd and aft cargo

2

Length of 737-800

129.5

3

Wingspan 737-800

117.5

4

Which flight deck windows can be opened?

Number 2 windows the captains can not open from the outside

5

How many emergency exits are there on 737-800

10

6

How many slides are there

One single lane on each of 4 cabin doors
Opening it with the slide armed inside automatically deploys slide

7

What emer equipment is in flight deck

One pbe
Two escape ropes
One halon
One crash axe
One elt
3 O2 masks
3 life vests

8

Describe emergency exit system

28 v dc system, automatically locks the emergency over wing exits flight locks engage on takeoff and remain engaged through landing or when dc power is lost

9

Emer equipment back of plane

Emk
Medical accessory pouch
Aed
3 first aid kits
2 halons
2 waters
2 pbe
2 megaphones
5 flash lights
Life jackets
3 life rafts
Elt

10

Where is crew O2 indication?

Aft overhead panel

11

Pax O2 system

Cabin alt 14000 auto
Controls are on overhead panel normal is auto selecting on activates

12

Runway turnoff switch

Inboard lights with the landing lights

13

When will emer lights automatically illuminate

If switch is armed and electrical power to dc bus 1 fails or ac power is turned off

14

Can the flight deck emer light switch be overridden

Yes by pushing on the emer exit lights switch on the aft flight attendants panel

15

How many batteries does the 737 have

2

16

When will an idg disconnect

When the temp of oil gets to high

17

What does the drive light mean on the idg panel

Low oil pressure or an under frequency condition

18

What is ac transfer bus one connected to

Main bus 1
Galley bus c and d
Ac ground service bus 1
Ac standby bus

19

What is ac transfer bus 2 connected to?

Main bus 2
Galley bus a and b
Ground service bus 2

20

What happens if a ac source supplying power to a transfer bus fails

It can be powered by any other ac power source through two bus tie breakers

21

Are the bus tie breakers manual or automatic

Automatic but they can be manually operated by bus trans switch

22

What does the source off light on the electrical panel indicate?

No source has been manually selected or the manually selected source has been disconnected

23

What is the automatic on line featur of the electrical system

If the aircraft takes off with the apu running and the apu is supplying power to the ac transfer busses when it fails or is turned off the btbs transfer the electrical load to the engine generators

24

What do the ground service busses power?

Power to the aircraft cabin as well as the battery chargers

25

When is the ground service switch in the cabin overridden?

When both ac transfer buses are powered

26

How many trus are there?

3

27

When does the tr unit light illuminate in flight and on the ground

In flight when tr 1 has failed or when tr2 and tr3 have failed
On the ground when any of them have failed

28

What are the batteries called

Main and auxiliary

29

Where are the batteries located

E and e compartment

30

What is the purpose of the main battery

Supplies electrical power to start apu or engines

31

What is the purpose of the auxiliary battery

Operates in parallel with the main only during use or standby power at all other times it is isolated from the electrical system

32

What is the normal voltage range for the batteries

22-30 volts

33

What does bat discharge light mean

Excessive battery discharge is detected

34

What are the three busses connected to the battery

Hot battery bus
Switched hot battery bus
Battery bus

35

Which bus is always powered

Hot battery bus

36

What happens when battery switch is selected on

All battery busses are powered and switching of standby electrical system to battery power is provided with the loss of normal power

37

describe the standby power system

Provides power when all generators fail automatic system provides standby power for minimum of 60 mins.
Powers hot batt bus
Switched hot batt bus
Dc standby bus
Ac standby bus through an inverter

38

What does the Amber elec light mean

On the ground only indicates a fault kin the dc power system or the stand by power system

39

Standby power switch in auto

Automatic switching from normal to standby power of power is lost from ac transfer bus one or do bus 1

40

Where are there fire detection and extinguishing systems

Engines apu cargo lav

41

Where is the outside apu fire control panel

Remote control panel located in the right main wheel well

42

How does engine overheat and fire detection work

Two gas pressure loops that vary based on temperature the detect overheat if they get warm and fire if they get warmer

43

What happens when one of the overheat detection loops fails

The remaining one acts as single loop there will be no indications if both fail the fault light illuminates