While it may be true that there are more than twice the number of engine failures/shut downs on twins than on singles, it's certainly true that twin pilot aircraft suffer many more than double the snags of a lone driver ('ere, are you sure this works like that/nah, it's like this/really/yeah/oh **** , it just broke/must have been like it when we left/yeah, bloody slack engineers...)
------------------
Ground tested, no fault found