A320 ENG STALL
 

I'm an engineer looking at the A320 ENG 1(2) STALL Procedure in the Airbus QRH for an older msn with CFM 56 engines and I'm trying to understand the concept of IDLE in the context of the associated ECAM caution - ENG 1(2) STALL - When do you get the ECAM and when do you not

The very first line in the ENG 1(2) STALL procedure states
"This warning is triggered for an N2 between 50 % and IDLE."
The procedure then requires a engine shutdown

Question 1 - Is the IDLE referred to there FLT IDLE or GND IDLE?

Further along in the procedure the QRH states
"If the N2 is above IDLE, this warning is not displayed on the ECAM."

Question 2 - Same as Q1 - Is the IDLE referred to there FLT IDLE or GND IDLE?

Far as I know its for both.

This drill is esp applicable for engine bird strikes.

50% N2 will always be sub-idle, which means the engine is in a sub-idle stall. Idle would be whatever the FADEC is attempting to control to at the time.

I don't think anyone can answer those questions.

I would say it is the "applicable" idle: flight in flight, ground in ground.

nnc0
Go to smartcockpit.com and look for flight ops Engines CFM A320 engines. It should answer most of your question. However on ground stabilised N2 is about 58.5. In air there is modulated idle and approach idle and N2 will vary at accordingly.