Have a look at the BA Forum Dashboard, and work down to the EC261 thread. BA has the same Trent engine blade issue for 787s as LOT, and has also denied EC261 claims . However both the small claims courts and the Alternative Dispute Resolution service have generally found in favour of the passenger when cases are brought to them (not in 100% of cases). In essence both the courts and the ADR body (CEDR) have agreed that this is "extraordinary circumstances", but that BA has not taken all reasonable measures to mitigate the issue from a passenger perspective.