Sorry Keg and others, I misinterpreted Dragons post below to mean that F/O’s upgrading to Captain were at 25% pass rate. If I understand now it is SO’s upgrading to F/O who have the 25% pass rate and that is much easier to understand what with the lack of flying etc.
Pass rate for FO upgrade on the 330 at the moment is 25%, yes 25%. FOs upgrading to command on the 737 been given 2 months off.