Hapag-Lloyd Flight 3378
They should definitely make an episode about that:
-Landing gear doesn't retract
-They still go ahead as planned but miscalculate the fuel consumption
-They run out of fuel and become a glider
-Crash landing, but everbody survives!
http://en.wikipedia.org/wiki/Hapag-Lloyd_Flight_3378
http://news.bbc.co.uk/1/hi/world/europe/831061.stm