747 Misc Systems

Question 1

IRS aligns in how many minutes

Answer 1

10

Question 2

IRS quick line does what and how

Answer 2

Clears positioners align then NAV, more accurate if position is entered.

Question 3

IRS power source left, center, right

Answer 3

Ac bus 3 , ac bus 2, ac bus 1

Question 4

IRS ATT

Answer 4

Loose V/S and A/S trend on PFD.
Required HDGing input on cdu

Question 5

Standby power and battery on for interior safety inspection why

Answer 5

Primary EICAS for flat position indicator

Question 6

Standby power to battery , what happens

Answer 6

Main and APU battery chargers are taken off line.
Isolates the standby busses from AC power to check effectiveness.

Question 7

APU switch to on does what?

Answer 7

APU inlet door opens
Apu fuel valve opens
DC or #2 aft fuel pump starts
Arms APU bleed air isolation valve

Question 8

Utility busses

Answer 8

How many 4
Turn one switch off turns two busses off

Question 9

Battery switch on

Answer 9

Connects main hot battery buss to main battery bus.
Connects APU hot battery bus to Apu battery us.
Above bus’s Available as a back up power source to Maine and 8 PM you stand by buses respectfully

Question 10

BTB in auto with ISLN light

Answer 10

AC bus removed from synch bus.
AC bus powered by its own generator.
Anything lost no only AC bus isolated DC isolation relay remains closed in auto position.
AC bus powered by its own generator.
Anything lost? no , only AC bus isolated DC isolation relay remains closed in auto position.

Question 11

EXT1, APU1,APU2,and EXT2 all available

Answer 11

ground handling bus powered, #4 aux hyd pump
main cargo handling bus powered
aircraft can be loaded and serviced

Question 12

Ground handling bus

Answer 12

Powered when avail lights on number 1 side
4, aux hyd pump
Lower lobe cargo loading equipment and lights
Fuelpanel

Question 13

Ground service bus

Answer 13

Powered when on lights is illuminated on #1 side
Battery chargers
Service lights and plugs
Fuel pump Apu start
Ground service switch on 1L door powers the service bus through ground handling bus

Question 14

Alternative way to power ground service bus

Answer 14

Switch by L1 door powers ground service bus through ground handling

Question 15

Drive light on IDG

Answer 15

High temp,low pressures, high freq

Question 16

Hyd system fault light

Answer 16

Low output psi
High hyd fluid temp
Low hyd reservoir qty

Question 17

Demand pumps come on

Answer 17

On ground when flaps in transit
In flight when trailing edge flaps out of up 1 and 4
Edp output psi low
Fire handle- pulled only because of low psi
Fuel control switch cut off

Question 18

Min in flight speed 4 engines out for hyd power

Answer 18

160 kts

Question 19

Fire test

Answer 19

Cwead-
Cargo tested on power up
Engine tested on power up
Apu test on power up
Duct not monitor
Wheel well not monitored

Question 20

Emergency lights powered by

Answer 20

Dc bus 4
15 min
Recharge takes 16 hours

Question 21

Fuel xfr main 1 &4 used when

Answer 21

QRH for dual fuel main boost pump failure in same tank

Question 22

Fire loops engine

Answer 22

“And” takes both loops to give fire indication
One loop inop , other will give fire indication if sensed