Also Airline Check and Training is very different to what is done in GA/RAA etc. For starters airline trainers and checkers are not necessarily instructors, and the flights may be conducting 'line training' but they are not technically flight training. So if somebody fails to meet acceptable standard during a RPT flight with passengers on board it really can't be decided at that point whether the flight can become 'line training' without an assessment of what needs to be done first, ie do they need to go as far as simulator work, that is actual flight training, before they return to the line. It would be very interesting to be a fly on the wall at the investigation if the checker chose to stay in the jump and conduct 'training' and then something happened where a passenger was injured or worse due to misshandling.