APU Limitations

Question 1

Minimum Temp Start

Answer 1

-40 Degrees C

Question 2

Max Start Altitude

Answer 2

30,000 ft.

Question 3

Max Altitude Bleed Air Use

Answer 3

15,000 ft.

Question 4

Max Altitude Engine Start

Answer 4

13,000 ft.

Question 5

Recommended Delay Time Between Cranking Attempts

Answer 5

2 minutes

Question 6

Maximum Starts/Start Attempts In One Hour

Answer 6

3

Question 7

APU Starter Duty Cycle Max Time On/Time Off

Answer 7

1. 30 Seconds on/No time off
2. 30 Seconds on/20 minutes off
3. 30 seconds on/No time off
4. 30 seconds on/40 minutes off