I got back from a Transatlantic trip on Tuesday, and not too surprisingly, my luggage did not arrive with me (I only had 15 minutes between flights and had to run through the airport).
I filled out a form with Swissport who handle these things, but it is now Thursday evening, and I have not heard anything about my luggage. The website I can supposedly check hasn't even acknowledged the existence of the luggage. Note that there've been two more flights since then on that route, so they had ample time to get the luggage over the ocean.
I filed a complaint with AirBerlin now and will try to get whatever EU law allows me to get here, because the handling is piss poor by AirBerlin.
Does anyone have experience with this kid of thing? I do know that filing the complaint within 7 days is important, so that should be taken care of. But I also expect that the airline will drag their feet as much as they can, and I don't want to give them the opportunity to weasel themselves out.