Originally Posted by
Centaurus
Normally not necessary in jet transports.
Don't confuse that technique published for example in the Cessna 172 POH that states: Crosswind Landings - When landing in a strong crosswind, use the minimum flap setting required for the field length. If flap settings greater than 20 degrees are used in side-slips with full rudder deflection, some elevator oscillation may be felt at normal approach speeds. However, this does affect control of the airplane.
Reduced flap settings with concomitant extra speed, run the risk of a longer float which is undesirable during any landing - cross-wind included.
On the A320, reduced flap (3) is recommended for windshear