Fifth pod carriage can cause unforseen problems. We were taking over a 744 on a transit through DEL a few years back to shuttle onwards to elsewhere in the subcontinent. It had come in carrying a fifth pod for another of our 400's which had landed in DEL a couple of days earlier on three
. Unfortunately some of the pax going through on the aircraft to it's final destination see the fifth pod being taken off, and really dont like the idea of going flying with an engine "missing"
Since they were non English speaking it took a little to convince them to stay onboard...