APU

Question 1

What action should you take if the utility pressure light has not gone out within 30 seconds after the APU ready light comes on?

Answer 1

APU switch off and wait one minute before attempting another start

Question 2

What are the three accessories of the APU?

Answer 2

-motor/pump
-generator
-fuel control

Question 3

What does the APU RDY light indicate?

Answer 3

APU is up to speed (magnet sensor)

APU exhaust gas temperature is normal (EGT probe)

Question 4

Answer 4

Auxiliary power unit

Question 5

Answer 5

APU Accessory Drive

Question 6

Answer 6

APU Hydraulic Motor Pump

Question 7

Answer 7

APU Generator

Question 8

Answer 8

APU Fuel Control

Question 9

Answer 9

APU Ignition Exciter/igniter

Question 10

Answer 10

APU Motor Pump

Question 11

Answer 11

APU Start Module

Question 12

Answer 12

APU Start Accumulator

Question 13

Name of circular pan on bottom of APU

Answer 13

Oil sump

Question 14

what info should be entered on the -13 if the APU start is not completed or the APU is automatically shut down

Answer 14

The BITE information from the DESU

Question 15

what component sequences and monitors the APU start and operation

Answer 15

Digital Electronic Sequencing Unit

Question 16

When is the APU restricted from use

Answer 16

in flight except during emergencies (engine restart during flight)

Question 17

what does the APU RDY light indicate

Answer 17

APU is up to speed, APU exhaust gas temperature is normal

Question 18

What info does the magnetic pickup send to the DESU

Answer 18

speed signal

Question 19

What provides fuel to the APU Fuel Control

Answer 19

left main fuel tank

Question 20

what 2 components on the APU provide a constant signal to the DESU

Answer 20

Magnetic pickup, Exhaust Gas Temperature