Thank you Tired.
It sounds as though the 340 takes a more realistic view of the possibilities than the rather 'bald' approach on the 744. My concern, obviously, stems from the recent incident which left me with the feeling that there could be problems induced by just strictly following the printed Checklist.
I was wondering if there would be a case for including operation of the Fire Switch as part of the engine shut-down following a suspected or actual fuel leak? That way, the spar valve would be closed and there should then be no further associated fuel problems. How does that sit with you?