Starting Limitations

Question 1

APU Start

Answer 1

After three consecutive APU start attempts, the Flight Crew must wait 60 min before a new start attempt.

Question 2

Applicable to A320 CEO

Answer 2

• A standard automatic start that includes only one start attempt, is considered one cycle
• For ground starts (automatic or manual) a 15 second pause is required between successive cycles
• A 30 minute cooling period is required, subsequent to three failed cycles or 5 min of continuous crank
• For manual start, observe a two-minute maximum cycle time
• For crank, observe a 5 min maximum cycle time
• The starter must not be run when N2 is above 10% on-ground and 18% in-flight

Question 3

Applicable to A320 NEO

Answer 3

• A standard automatic start that includes up to three start attempts is considered one cycle
• For ground starts (automatic or manual), a 35 second pause is required between successive cycles
• A 15 min cooling period is required, subsequent to three failed cycles, or 15 min of continuous or cumulated crank
• The starter must not run when N2 is above 20%