Originally Posted by
vilas
There is difference in procedure for flaps jammed =0 and flaps jammed>0 while it is silent on slat>0 why is that?
From an aerodynamics point of view a swept wing airplane like the A320 will have negative effects from flying with flaps extended and no slats out, hence the procedure (in case of FLAPS jammed) asking to maintain the landing configuration in even in case of diversion and to select clean only if the FLAPS are jammed exactly at 0, so no negative effects in aerodynamics.
If SLATS are jammed regardless of their position we can safely clean up the FLAPS as the airplane will have no adverse aerodynamics issues even with SLATS psn 3 and FLAPS 0. The opposite is not true, this is why when talking about Slats/Flaps locked we have only one condition which will lead the airplane in ALTN LAW, that is less than 17deg of Slats (less than Flaps position 1) and more than 13deg of FLAPS (At or above CONF2, but it would be more correct to say above Flaps position 1 imho).
In the above scenario the airplane is unable to retain Normal law due to the likelihood to hit easily alpha prot given the reduced stalling AOA and ALTN LAW intervenes without reduced protections to avoid UAS induced by the protections.