Electrical

Question 1

What three things trigger automatic ADG deployment?

Answer 1

Both main buses are not powered (AC Bus 1 and 2),
Battery Master is ON, and
The generators are inoperative.

Question 2

What happens to hydraulics during ADG deployment?

Answer 2

The hydraulic pump transfer relay connects hydraulic pump 3B to the ADG BUS regardless of switch position.

Question 3

If AC power is re-established after ADG deployment, will AC power automatically transfer back to the main buses?

Answer 3

No. AC power must be transferred back to the main buses via the PWR TXFR OVERRIDE switch.

Question 4

What are the ADG airspeed limits?

Answer 4

Up to 250 KIAS for the remainder of the flight.
250-330 KIAS for 12 minutes.
330-335 KIAS for four minutes.