Engine spool up on approach - Airbus
Join Date: Jun 2000
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Power is there to maintain a speed no matter what the configuration. As has been said the atmosphere is not a static entity. It is changing and so therefore will the power setting necessary to maintain the speed. Due to short lived shear factors the power could be quite variable for a few seconds. It is not uncommon to give a significant burst followed almost immediately by a reduction to datum; or equally a handful reduction and then back to datum.
It would be sod's law that this happens at landing gate and you have an overly keen PM with the SOP call of "continue" or "Go-around" and they close the latter.
It would be sod's law that this happens at landing gate and you have an overly keen PM with the SOP call of "continue" or "Go-around" and they close the latter.
Only half a speed-brake
As we failed to convince you, here's one from non-modified Airbus A320 FCOM, that hopefully will help solve your dispute:
Originally Posted by PRO-NOR-SOP-18-A: "B - STABILIZATION CRITERIA"
...
In order to be stabilized, all of the following conditions must be verified before, or at this stabilization height:
‐ The aircraft is on the correct lateral and vertical flight path
‐ The aircraft is in the desired landing configuration
‐ The thrust is stabilized, usually above idle, in order to maintain the target approach speed along the desired final approach path
‐ There is no excessive flight parameter deviation.
In order to be stabilized, all of the following conditions must be verified before, or at this stabilization height:
‐ The aircraft is on the correct lateral and vertical flight path
‐ The aircraft is in the desired landing configuration
‐ The thrust is stabilized, usually above idle, in order to maintain the target approach speed along the desired final approach path
‐ There is no excessive flight parameter deviation.
"Usually above idle" is vague and does not clearly solve the riddle.
as long as you hit the stable point as required by the company, then you will probably be powered up. Although sometimes a lightly loaded 330 on a gusty day will hit the idle stops occasionally all the way down final.
approach idle is designed to eliminate the need for a specific spool up setting on final which is why its vague and no setting is published.
as long as you hit the stable point as required by the company, then you will probably be powered up. Although sometimes a lightly loaded 330 on a gusty day will hit the idle stops occasionally all the way down final.
approach idle is designed to eliminate the need for a specific spool up setting on final which is why its vague and no setting is published.
