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SPIRIT AIRLINES - A320 (Updated monthly 2023) > APU > Flashcards

Flashcards in APU Deck (15)
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1
Q

When is the APU available?

A

> 99.5 % or 2 seconds after N is above 95%

2
Q

Automatic shut down occurs:

A
High Oil Temp
Overspeed 
Temperature (Hot EGT)
Underspeed
Overspeed
Fire (on ground)
No acceleration 
No Flame 
ECB Failure 
Slow-start 
*AOM 49.20.2
3
Q

APU service ceiling

A

FL398

4
Q

Max Altitude to supply electrical power

A

SFC - FL398

5
Q

Max Altitude for APU start with battery only

A

SFC - FL250

6
Q

Max Altitude for APU bleed (One Pack)

A

SFC - FL200

7
Q

Max Altitude for APU bleed (Two Pack)

A

SFC - 15,000 FT

8
Q

Max Altitude to start an Engine

A

SFC - 8,000 FT

9
Q

What does the APU Fire PB do?

A

Shuts OFF APU without a cooling period

10
Q

Why must you leave the batteries on after shutting down the APU and how long?

A
  1. To ensure Fire Protection until complete shutdown
  2. Ensure intake flaps close
  3. APU computer remains powered through shutdown
  4. APU scavenge oil to APU sump to prevent cabin fogging on subsequent starts
11
Q

How do you know you’re using APU electrical power?

A
  1. An UP arrow from the APU SD page

2. Load is displayed on the APU SD page

12
Q

How much time is required in order to push the START PB after MASTER has been pushed?

A

At least 5 seconds

13
Q

APU is available when?

A

Approximately 1 minute after START PB pushed
AVAIL in APU SD Page
AVAIL displayed in START PB button

14
Q

How much battery power is required if starting the APU with the battery only? And how much time do you have with the batteries to start?

A

At least 25.5 or greater

30 minutes

15
Q

What condition in the APU system would cause an external horn to sound?

A

APU Fire