On the Airbus aircraft, the engine flight idle increases to "approach idle" setting, based on flap selection (i.e. Flap 1 on the A320 family) or the selection of landing gear down (widebodies). From the depths of my memory this is to comply with FAR 33.73 engine idle to 95% of take off thrust spool up time requirements.
Perhaps someone can take us through how this relates to the FAA 8900.1 order as cited by IGh?
If the approach idle setting on the Airbus aircraft meets FAR 33.73 requirements does that mean that it complies with FAA 8900.1 or do we need to have a higher minimu thrust setting? IF we do what is the minimu setting to be in compliance with FAA 8900.1?