Just wondering, as the turn around of the Singapore Airlines aircraft to IAH is only 90 mins, would this leave sufficient time to process say one hundred passengers through US pre-clearance in the future? Also could delays processing passengers in US pre-clearance cause delays to the aircraft?
BA in SIN manage to get everyone off a 777, clean the cabin and get a full load of passengers through security and on their way in 1 hour 40. US entry clearance can be quite quick these days, so on the assumption that some people will leave the fight at MAN, a 90 minute stop seems doable.