APU CBT

Question 1

Where are the APU gauges located?

Answer 1

On the EICAS

Question 2

What can the APU provide?

Answer 2

AC Electrical Power

Bleed Air

Question 3

What are the limitations of the APU?

Answer 3

Max Start altitude - 30,000’
Max Operating altitude - 33,000’
Max Altitude for APU engine start - 21,000’
Max Altitude for APU AC/pressurization - 15,000’

Question 4

What APU information is seen on the EICAS?

Answer 4

RPM and EGT

Question 5

What is the APU procedure when shutting down the aircraft?

Answer 5

Turn the APU OFF
After receiving the OFF indication wait an additional 80 seconds to receive an APU FUEL SOV CLOSED ECAS MESSAGE before turning off the batteries.

Question 6

APU selector knob indications

Answer 6

OFF: Commands APU shutdown sequence, immediately turns off APU bleed
ON: Position for running
START: Starts APU, spring loaded back to ON

Question 7

During normal Skywest operation, when should the APU be started?

Answer 7

Unless needed for power or a/c, start the APU 10 minutes prior to pushback. APU bleed is used to start engines.

Question 8

APU Emergency Stop button

Answer 8

Pushed IN: Closes APU fuel SOV, and immediately shutdown APU with no cool down period.
White bar will illuminate.
Push OUT: Normal operation
In the event of an APU fire the top half will illuminate RED