HD,
Maybe I should take out inevitably, for persons with a high level of professional standards and discipline it should make no difference. But safety is a numbers game, on the balance of probabilities I do not think it is a good idea to allow the same crew pairing for an extended time in a commercal airline environment, regardless of the reasons. Same reason why having two training captains up front, with a third on the jumpseat for good measure, is a sure way of asking for trouble.
Last edited by andrasz; 1st Nov 2016 at 17:44.