A320 APU Bleed after landing
Hi guys,
Apology for this silly questions.
During docking the aircraft, with a condition APU is available.
Some of my instructor, instructed me to turn on the APU BLEED after 3 minutes IDLE power have been reached after landing while and the aircraft is just couple meters from parking bay.
While others instructors, instructed me to turn on the APU BLEED once the aircraft is stoping with the condition parking break is SET.
As far as my understanding, the APU BLEED is used as an Air Condition, after the engine shut down.
My question is how is the APU BLEED connection with ENGINE BLEED related to safety before engine shutdown?
Thanks in advance guys