"Jay Honeck" wrote:

After seven (?) incidents of landing gear malfunctions similar to the
Jet Blue incident, why has the FAA not issued an emergency
Airworthiness Directive on the Airbus A320?

Or has an AD been issued, but without the requirement to "ground" them
until they've been repaired?

They did issue one. A number of the earlier incidents were because an O
ring became distorted. The French version of the FAA had issued a
maintenance instruction requiring replacement of the ring, and the FAA
eventually did the same. They probably thought that solved the problem.

There are also apparently a couple of causes: One is the O ring, and the
other is incorrect reassembly of the gear by maintenance forces. They
probably thought both were fixed.

As far as grounding the A320, then you would also have to ground the
A318, A319, and A321, since they have essentially the same gear. You
might also have to ground the other Airbus models, since the gear is
made by the same company, and might have similar design deficiencies.

While were at it, why didn't the FAA ground the middle vintage 737s when
they had two fatal accidents from suspected rudder reversals, plus a
couple of rudder control incidents reported by other airlines while in
flight? At least the A320 nose gear problem hasn't yet resulted in any
fatalities.