I went to SJO for some spotting today and when I arrived at 14:10 local time, I noticed an IB A340 at the remote stand at SJO. I didn't know what to think of it, as perhaps IB6313 might have arrived early today. However, IB6313, operated by EC-IQR, arrived on time today, at around 15:20, so the aircraft at the stand was supposed to operate yesterday's flight back to MAD, IB6310.
I couldn't catch the registration of the aircraft, as it was too far away. Does anyone know why that other A340 was AOG?