I would have thought they would have figured somewhere in their statistical analysis for EDTO. Are QANTAS still swapping engines between B767 and B747 like they used to many years ago?
When was this? The mid '80s with the 767-200s?
As far as I recall, the Rollers on the current 767s are not the same as those on the 744 and we got the first Roller 767 in 2001/02. Therefore they've never been swapped. The CF6s on the 300s are not the same as the CF6s on the 744s and they've never been swapped. That only leaves the Pratts that were on the 767-200s and I'm not sure what 'overlap' there was from when we got the first 767-200 in about the mid 80s and Pratt engined jumbos.