Legacy 500 Electrical RKA Questions

Question 1

What type of electrical system is the airplane equipped with?

Answer 1

28V DC Electrical Power, Generation and Distribution System (AOM 9-05-01)

Question 2

If both generators are available, do they operate in a split bus mode or parallel mode?

Answer 2

• Split bus mode (AOM 9-05-01)

Question 3

What does the white AVAIL light indicate?

Answer 3

1. That the GPU button is pushed out
2. A GPU is connected
3. The voltage is set between 25V DC -30V DC
   (AOM 9-05-30)

Question 4

Which light will illuminate when the GPU button is pushed in and providing power to the airplane?

Answer 4

• The green IN USE light (AOM 9-05-30)

Question 5

If the APU is started while the airplane is being powered by the GPU, which one will be the source of electrical power for the airplane?

Answer 5

The APU
(AOM 9-05-30)

Question 6

What color does the battery voltage indication show if the battery is discharging?

Answer 6

• Amber (AOM 9-05-30)

Question 7

What will the indication be on the electrical synoptic page if the GPU is connected but is not providing power to the airplane?

Answer 7

• A white GPU (AOM 9-05-30)

Question 8

Will the Ram Air Turbine (RAT) be continuously displayed on the electrical synoptic page? If not, when will it be displayed?

Answer 8

• No, when it is deployed and providing power to the airplane

(AOM 9-05-30)

Question 9

How can a pilot manually command the RAT to deploy?

Answer 9

• The right seat pilot can pull the RAT manual deploy control (AOM 9-05-30)

Question 10

What are the main engine generators and the APU generators rated at?

Answer 10

• 28V DC, 600 A maximum continuous output (AOM 9-05-40)

Question 11

What is the minimum GPU voltage required to start charging the batteries?

Answer 11

28V DC (AOM 9-05-40)

Question 12

What buses is the APU capable of supplying power to on the ground if the APU is the only source of electrical power?

Answer 12

• All electrical loads, including the SHED BUSES and charging the batteries
  (AOM 9-05-40)

Question 13

What buses are the APU capable of supplying power to in flight?

Answer 13

• All electrical loads, (except for the SHED BUSES) and charging the batteries
  (AOM 9-05-40)

Question 14

What buses does the RAT generator power?

Answer 14

EMER BUS 1, EMER BUS 2 and EMER BUS 3, as well as providing battery charge current (AOM 9-05-40)

Question 15

When will the RAT automatically deploy?

Answer 15

• During an electrical emergency (AOM 9-05-40)

Question 16

In flight, when will an electrical emergency occur?

Answer 16

• When the two main generators and the APU generator are unavailable.
  (AOM 9-05-40)

Question 17

How many main batteries are there?

Answer 17

• Two (AOM 9-05-40)

Question 18

What is the rating of the main batteries?

Answer 18

24V DC 40 Ah NiCad batteries (AOM 9-05-40)

Question 19

If the batteries are the only source of electrical power in flight, what buses will be powered and what CAS message will be displayed?

Answer 19

• The EMER BUSES;
  The red BATT DISCHARGING CAS message

(AOM 9-05-40)

Question 20

In an electrical emergency, what buses are powered/ isolated from the aircraft electrical system?

Answer 20

• EMER BUS 1, EMER BUS 2 and EMER BUS 3
  (AOM 9-05-55)

Question 21

In an electrical emergency, what sources of power can provide electrical power to EMER BUS 1, EMER BUS 2 and EMER BUS 3?

Answer 21

BATT 1, BATT 2 or the RAT (AOM 9-05-55)

Question 22

For ground servicing, when a GPU is connected and providing power to the airplane, with the GPU button pushed out and the BATT 1 and BATT 2 switches in the OFF position, which bus is energized by the GPU?

Answer 22

• SHED BUS 1 (AOM 9-05-55)

Question 23

What buses will be energized when the airplane is de-energized and there is no electrical power source available?

Answer 23

• HOT BATT BUS 1 and HOT BATT BUS 2 (AOM 9-05-55)

Question 24

Which battery is connected to the APU START BUS to assist with an APU start?

Answer 24

BATT 2
(AOM 9-05-55)

Question 25

How many generators need to be operating in order for the SHED BUSES to be energized in flight?

Answer 25

• Two (AOM 9-05-55)