The fuel filters are routinely replaced prior to delivery of a new aircraft.
That being said, this one is fishy. I've seen the 21.3 report, and it doesn't make LOT maintenance look good (sorry, I can't elaborate). It's possible that the aircraft was delivered w/o filters, but it is also possible they were removed but not replaced by LOT prior to the event.
At any rate, Boeing QA has launched an investigation.
Last edited by tdracer; 23rd Sep 2013 at 23:52.
Reason: Edited to clarify