I just flew US (well, HP) for the first time (SJC->PHX) and on one of their A320's. I have a couple of questions about the bird itself.
1.) On both flights in and out, as the plane pulled away from the gate and throughout the taxi, then for a number of seconds after takeoff, I heard noises from the belly of the beast. It wasn't a continuous sound, rather like someone was down there with a power ratchet, going from bolt to bolt and tightening them. It was fairly constant, maybe one squeak every half-second, then gradually slowed down and faded in volume. It's really hard to type out what it sounded like. What sort of mechanical activity is going on during these portions of the taxi and takeoff?
2.) Some of the windows on the plane had little black triangles over them. They didn't seem to correspond to the location of oxygen canisters/lights/etc in the overhead bins or to exit rows (I was in the row 10 exit and I saw one maybe one or two rows ahead of me). What do these symbols mark?
Thanks for satisfying my curiousity. No complaints about the flight or the crew, everyone was very professional and there were no major hitches (though my PHX->SJC leg was delayed a bit -- the APU was offline and they had to pump air in to get the engine started up). Still, based off that experience I wouldn't have any problem flying US/HP again. The plastic cups for drinks onboard were bigger than what UA gives you.