Electrical System

What are the electrical power generation sources on the ATR 72-600 aircraft?

Two AC wild frequency generators.

Two engine-driven DC starter/ generators.

Main and emergency batteries.

All of the above.

What type of batteries is used on the ATR 72-600 aircraft?

24V Ni-CD 43 Ah (main BAT), 24V Ni-CD 17Ah (emer BAT)

28V Ni-CD 43 Ah (main BAT), 28V Ni-CD 17 Ah (emer BAT)

26V Ni-CD 43 Ah (main BAT), 26V Ni-CD 17Ah (emer BAT)

30V Ni-CD 43Ah (main BAT), 30V Ni-CD 17Ah (emer BAT)

Where is the DC starter generator located?

On the LP spool through the reduction gear box

On the LP spool through the accessory gear box

On the HP spool through the reduction gear box

On the HP spool through the accessory gear box

When is the DC starter generator a Generator

Above 66% NH

Above 65% NH

Above 61.5% NH

Above 66.5% NH

Can the DC generators provide power when the GPU is connected and in the ON position?

Yes

With Dual DC Gen Loss is DC power still available?

Yes through the TRU

Yes through the Hot battery bus with the TRU inoperative.

Both a+b

What is the purpose of the BIC?

Allows INV 1 and 2 to be online when only one generator is operating or EXT power connected.

Allows DC BUS 1 and 2 to be online when only one generator is operating or EXT power connected.

Allows DC GENI and 2 to be online when only one generator is operating or EXT power connected.

Allows MAIN BAT and EMER BAT to be online when only one generator is operating or EXT power connected.

The source of constant frequency AC power consists of?

Two batteries

Two ACW generators

Two DC generators

Two STATIC inverters

Where are the ACW generators located and when is it a generator?

On the reduction gear box and at 61.5% NP

On the accessory gear box and at 66% NP

On the reduction gear box and at 66% NP

On the accessory gear box and at 61.5% NP

On the ground with one ACW generator online and BC closed what BUS is shed?

ACW BUS 1

ACW BUS 2

DC GND Service Bus

ACW GND Service Bus

On the ground with an EEC or PEG fault with the fuel governing mode lost is that specific ACW generator available?

Yes

In Flight with one ACW fault which BUS is shed first?

ACW BUS 1

ACW BUS 2

DC GND SERVICE BUS

ACW GND SERVICE BUS

With the AC GPU ON which BUSES are supplied with power through the BTC?

ACW BUS 1

ACW BUS 2

ACW GND SERVICE BUS

All of the Above

With the ACW GPU connected and in the ON position with Both ACW online which source is powering the BUSES?

ACW 1

ACW 2

ACWGPU

Both a + b

In the event of DUAL DC GEN LOSS the TRU partially energizes the DC system through which BUS?

ACW BUS 1

ACW BUS 2

ACW Service BUS

ACW GND POWER

What is the function of the ACW BPCU?

Control and protection of the EXT PWR

Control and protection of the BUS TIES/BTC

Control and protection of the SVCE BUS

All of the above

Electrical System

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