Electrical

Question 1

Gen bus power priorities

Answer 1

Associated IDG
APU
AC tie bus

Question 2

AC tie bus priorities

Answer 2

External power
IDG
(APU will never power AC tie bus)

Question 3

What does emergency power test check?

Answer 3

LEAC/LEDC buses
Charger (battery)
ADG circuitry

Question 4

When does emergency power come on?

Answer 4

Loss of LEAC or LEDC

Question 5

What happens when Smoke Elec/Air switch is moved out of NORM?

Answer 5

DEUs go full bright
ECON mode off
Emergency power inhibited from coming on when selector is in 1/2 position

Question 6

With ALL GEN OFF, what is powered by the battery only? How long does the battery last?

Answer 6

Short range, non precision-
IRU 1, IGN A, MCDU 1 (standby), CADC 1, DUs 1&3, DEU 1, VOR 1, VHF 1, Comm 1

Lose #2 engine

15 minute battery power

Question 7

With ALL GEN OFF, what is powered when ADG is deployed? How long does the battery last?

Answer 7

ADG powers LEAC
Battery life extends to 90 minutes
No additional equipment is powered

Question 8

With ALL GEN OFF, what is powered with ADG in ELEC mode? How long does the battery last?

Answer 8

Long range, precision-
Add- IRU 2, IGN B, CADC 2, DUs 4-6, DEU 2, VOR 2, ILS 2, VHF and Comm 2, HF 2, MCDU 2, FMC2, #2 aft boost pump and eng 2, tail tank alt pump

ADG will power REAC, REDC, and LEAC. REDC will power static inverter so battery charger will charge the battery.

Unlimited battery life