APU

Question 1

What manufacturer?

Answer 1

Honeywell 36-150

Question 2

Does apu has auto shutdown if you dont turn it off before takeoff?

Answer 2

Yes. Weight off wheels

Question 3

What is the happening when the Master ON light flashes 9 times?

Answer 3

Selt test, Fuel valve opening and boost pump running

Question 4

Does the APU auto shutdown for a fire?

Answer 4

Yes. But it does not blow the bottle.

Question 5

Average APU burn?

Answer 5

250 lb/hr

Question 6

Does the APU have a starter generator?

Answer 6

Yes

Question 7

Does the APU have a dual ignition system?

Answer 7

Yes

Question 8

How many minutes after start is the APU bleed available?

Answer 8

2 minutes

Question 9

Can you do an APU oil test while the APU is running?

Answer 9

No

Question 10

What module controls the APU starting and stopping and all other monitoring functions?

Answer 10

ECU … APU Electronic Control Unit

Question 11

What all is automatically closed when a fire is detected in the apu?

Answer 11

For the APU: when the fire is detected:

• The Fuel Shut Off Valve is automatically closed,
• The generator is automatically disconnected,
• An emergency shut down is commanded by the ECU.