Originally Posted by
OrlandoFlyer
I believe that Dublin pre-clearance is now the same as Shannon Airport. At Shannon you go through regular Shannon airport security and then you enter the pre-clearance area and go through US style security (without the yelling) - shoes off, etc. Next you come to the CBP booths, where they do the immigration check and also show you a CCTV picture of bags and do the customs check.
Yes, the former pre-inspection facility at DUB has now been upgraded to a full CBP pre-clearance facility (but only for commercial flights) similar to the one they've had in SNN since late summer 2009.
(Unlike DUB, the SNN facility is also able to pre-clear US-bound
private aircraft.)
(And for the trivia buffs among us, CO25 SNN-EWR was the first US flight cleared at the new SNN facility in Aug. '09)