This is already off the thread track, but does have some relevance!
For obvious faults I don't think you can go past the supposedly true story of a student at RAAF 2FTS in Pearce WA in the days of the Macchi who was particularly slack at doing his walkaround.
His instructor one day teed up the maintenance crew to nominate an obviously unserviceable aircraft for their flight, and sent Bloggsie off to preflight it.
A little while later the instructor strolled out to the aircraft, requested our hero to unstrap, and took him round the aircraft once more to spot any little things that could possibly have stopped them getting airborne.
After some prompting, this aviating Sherlock Holmes finally noticed that the lack of an engine might perhaps have led to a few problems getting out of the carport.