After the Ryanair incident at Memmingen (see 'Ryanair too low' on this forum), my valued German colleagues seem to milk the BFU's september bulletin for all it's worth. The
bulletin (PDF) notes an incident at Heraklion on September 21. A Boeing 737-800 declared an emergency because "after a while in holding and a go-around, fuel level went below required minimum".
A
news item (German) by "Spiegel Online" identifies this as an Air Berlin flight, that landed safely after emergency was declared. The airline didn't answer requests for comment due to "ongoing investigations". Looks like Greek authorities are investigating.