Saw this on another site (edited):
1. Since long time a DHC-8-400 is stored in Toronto (YZD) (not paid for, never delivered).
2. There are 3 Boeing 737-700s stored in Southend (SEN) [5N-MJC, 5N-MJI and 5N-MJJ]
3. I heard that the new delivered A330-200 [5N-EIA] was returned to the lessor.
I have not heard this last rumour #3. It wouldn't surprise me. But, to my knowledge, it's still flying, until Arik defaults on another debt.