A320 Interesting flap configuration
A320 has a rather interesting scenario in its auto configuration between flaps 1 and flaps 1+F.
The description of the scenario as per the FCOM goes as follows
When the flaps are at FLAPS 1(I.e slats extended and flaps retracted) and air speed reduces to less than or equal to or 100 kts then the flap configuration changes to FLAPS 1+f (I.e slats extended and flaps extended to 10).
Now this scenario is possible only when you land with configuration 1, which happens in a unique scenario in case of reverser unlocked. Can any of the Bus drivers throw light on why Airbus came up with this rather weird automatic configuration change?