Thanks for all the replies.
Bugs/Bearings/Boxes: We were indeed sitting in the row behind the overwing exits, so hopefully your assessment is correct. Strange though that I often sit near the overwing exits but have never noticed this sound before.
easyflyer83: Thanks and hopefully that is correct.
L'aviateur: I've flown with this airline many times and have always been impressed. However, we both know that things aren't always done up to Western standards here, regardless of what the official line may be.
Last edited by scroggins; 28th Jun 2012 at 10:02.