I remember many moons ago returning from Spain on a Spantax DC8, may have been a Corronado but I seem to remember DC8 if they had any, the Captain was smoking a pipe I remember.I think he wanted to look like ex RAF. Anyway, the landing gear would not retract.He told us SLF with our buckets and spades and stuffed donkeys that he had decided to continue but we had to re-fuel.It did not seem any different from a normal flight, apart from the re-fueling.