A friend sent a mail saying that a TK A319 took off in IST for a domestic flight and did not/forget to raise the gear???
The airplane climbed to FL230 and had to land half way to refuel.
After that they continued to their original destination (uneventfully).
Might have been a sys failure but why would they continue if they just left the main base?
Fishy story? But also published on a Turkish aviation forum.
