I figured something was whacky and beat a hasty retreat back for a landing when I discovered my (and the mechanic's) oversight.
On another thread I was beaten up for saying that the most dangerous aeroplane to fly is one just out of maintenance. I was accused of being nasty to engineers, I wasn't, I have the greatest respect for them, but mistakes do occur in the best regulated workshop. You cannna be toooo carrrreful !