ENAC (the Italian National Aviation Agency) announced today that it ordered the FCO management company (AdR) to shut down the departures from T3 till Boarding area D is operative again. The closure will be effective on June 11.
The operations from FCO will therefore decrease to 60% capacity. Not sure how this will affect travel for those departing from FCO. Some members of Parliament have proposed to transfer some flights to Rome Ciampino (CIA) or to the Air Force base at Pratica di Mare, just a few km south of FCO or Grosseto. Some low cost flights have been moved to CIA already.
Stay tuned. In the meantime be aware of extraordinarily long lines at the departures.