My girlfriend, an EU citizen, is travelling from Sydney back to Brussels with a connection in Doha. What she booked was one trip, but Qatar Airways split it in two: Sydney - Doha then Doha - Brussels. She's not supposed to leave the Doha airport.
The Sydney - Doha flight got cancelled because of a system failure in the airplane. Her flight Doha - Brussels is not cancelled.
When I'm looking for information about the whole situation I only land on Qatar Airways' "EU Air passenger rights" page that speaks only about flights regarding the EU airspace, not EU passengers.
Since she can't make it to the Doha - Brussels flight because of a failure in the first flight from the same company, is she entitled to compensation as usual, as described by the EU's Flight Compensation Regulation EC 261/2004? If not, what is she entitled to?