Systems Flashcards
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
Length of 737-800
129.5
Wingspan 737-800
117.5
Which flight deck windows can be opened?
Number 2 windows the captains can not open from the outside
How many emergency exits are there on 737-800
10
How many slides are there
One single lane on each of 4 cabin doors
Opening it with the slide armed inside automatically deploys slide
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
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
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
Where is crew O2 indication?
Aft overhead panel
Pax O2 system
Cabin alt 14000 auto
Controls are on overhead panel normal is auto selecting on activates
Runway turnoff switch
Inboard lights with the landing lights
When will emer lights automatically illuminate
If switch is armed and electrical power to dc bus 1 fails or ac power is turned off
Can the flight deck emer light switch be overridden
Yes by pushing on the emer exit lights switch on the aft flight attendants panel
How many batteries does the 737 have
2
When will an idg disconnect
When the temp of oil gets to high
What does the drive light mean on the idg panel
Low oil pressure or an under frequency condition
What is ac transfer bus one connected to
Main bus 1
Galley bus c and d
Ac ground service bus 1
Ac standby bus
What is ac transfer bus 2 connected to?
Main bus 2
Galley bus a and b
Ground service bus 2
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
Are the bus tie breakers manual or automatic
Automatic but they can be manually operated by bus trans switch
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
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
What do the ground service busses power?
Power to the aircraft cabin as well as the battery chargers
When is the ground service switch in the cabin overridden?
When both ac transfer buses are powered
How many trus are there?
3
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
What are the batteries called
Main and auxiliary
Where are the batteries located
E and e compartment
What is the purpose of the main battery
Supplies electrical power to start apu or engines
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
What is the normal voltage range for the batteries
22-30 volts
What does bat discharge light mean
Excessive battery discharge is detected
What are the three busses connected to the battery
Hot battery bus
Switched hot battery bus
Battery bus
Which bus is always powered
Hot battery bus
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
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
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
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
Where are there fire detection and extinguishing systems
Engines apu cargo lav
Where is the outside apu fire control panel
Remote control panel located in the right main wheel well
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
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
