Fatigue
QR adopted changes to its FTL's about ULR and SLR flights. The crews for half the year do these 15+ hour flights (which used to be ULR) with less than 24 hours rest in the hotel and back to their base. This is followed usually by a trip east bound after minimum rest. Multiple west-east-/east west trips, less than 24 hours rest because they changed "their" definition of ULR Flights, and "factored" hours resulting in the crews working actually over 100 hours a month. Could fatigue/accumulated fatigue be a factor in this incident/accident?