Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

USAPAT Study > G550 Electrical > Flashcards

G550 Electrical Flashcards

1
Q

The HMG (Hydraulic Motor Generator) provides:

A
  • AC power to the AUX TRU and Standby AC Buses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the normal AC power source for the AUX TRU and ESS AC bus?

A
  • L MAIN AC bus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

If the L MAIN AC bus is unpowered, will the AUX TRU and ESS AC bus automatically switch to another power source?

A

YES. Both switch to the R MAIN AC bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the “DEAD BUS” power logic for the AUX TRU?

A
  • ESS bus before MAIN
  • LEFT side before Right side
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the purpose of the E-inverter?

A

Provides AC Power for the ESS AC bus (if the ESS AC bus loses power)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the normal position of the E INV switch?

A

AUTO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How long do you wait between selections of L ESS and R ESS when using HMG?

A

10 seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The 60Hz converter can be used to:

A

Power the outlets in the galley and passenger cabin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

If you lose L MAIN AC BUS power, what happens automatically?

A
  • AUX TRU transfers to R MAIN AC BUS
  • AUX TRU Powers L ESS DC Bus
  • ESS AC bus transfers to R MAIN AC bus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How would you power L MAIN DC BUS for the above situation?

A

Use the L TRU switch / Push / Observe RAC (switch capsule)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What two (2) sources can power ESS DC buses simultaneously?

A
  • L / R Main batteries
  • AUX TRU (when powered by the HMG)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When do you push the RESET switch?

A

CAS MSG / CHECKLIST says to push it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The MAIN BATTERY switches illuminate ON when:

A
  • The MAIN BATTERIES were pushed ON and are Powering the ESS buses
  • When starting the APU
  • When AUX pump is operating
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Describe a BREAK POWER TRANSFER

A
  • A momentary interruption of power to one or several busses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

All automatic power transfers will be NBPT’s except between

A

External AC power and APU generator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the function of BUS TIE ISLN SWITCH?

A
  • Prevents / Allows alternate power sources to power failed bus side?
  • Allows you to isolate buses
17
Q

What is the color of the GEN switch if the generator is turned off?

A

Black – Grey

18
Q

What appears in the GEN switch if the GEN FAILED?

A
  • Amber “OFF”
19
Q

The ground service bus may be powered on the ground by:

A
  • R MAIN DC BUS, when available
  • R battery or directly from external DC power receptacle when using one of three switches
20
Q

How can you tell if GND SVC Bus is powered?

A
  • Beacon is illuminated
21
Q

Can you look at the Electrical Panel and tell if the GND SVC BUS is powered

A
  • GND SVC BUS capsule will have “ON” illuminated
22
Q

Is GND SVC BUS powered in flight? And by what?

A
  • YES
  • R MAIN DC bus
23
Q

How many GND SVC BUS switches are there and where are they located?

A
  • 3 (three)
  • Forward External Switch Panel Access Door
  • Tail compartment
  • Remote Refuel Panel behind Captain seat in cockpit
24
Q

How do you know the generator has failed if looking at the synoptic?

A

GEN is outlined in Amber

25
Q

Will GND SVC BUS turn off automatically?

A

Yes, when main cabin door, forward external switch panel access door and tail compartment door are all closed

26
Q

How many E-Batts are there

A

Four (4)

27
Q

What do the E-Batts power?

A
  • Avionics Power – (2)
  • Emergency Lighting – (2)
28
Q

What do the Avionics E-Batts Power?

A

Clocks
* STBY INST Panel (SFD / EBDI)
* Gear Handle and Indicator
* MCDU’s 1 & 3
* CAPT Audio Panel

29
Q

Emergency Batteries (E-Batts) when armed will activate when:

A

An ESS DC bus power drops below twenty volts

30
Q

With E-Batts on, what appears on MCDU 1 & MCDU 3?

A
  • MCDU 1 – STBY ENG INST & FUEL
  • MCDU 3 – BACK UP RADIOS (VHF 1 COM / NAV) and ATC 1
31
Q

When the aircraft operates on emergency batteries the crew can only tune:

A

COM 1 / NAV 1 / ATC 1 on MCDU 3

32
Q

In emergency battery mode the:

A

Cockpit speakers are not available

33
Q

ACP on E BATTS – illuminated

A

Captain – COM 1 / SPKR ICS + Phone + MIC

34
Q

Can you plug in AC & DC External Power at the same time?

A

Yes

35
Q

Which external power source has priority? AC or DC external power?

A

AC

36
Q
A
37
Q

Why would you use DC EXT PWR?

A

Start APU with low battery voltage

USAPAT Study (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions