The A300 was in production until 2007 if I recall. The aircraft in question here, N155UP, had its first flight in 2003. By my standards, that's new
To go go back to your first paragraph, I think lots of people want to think there's a mechanical reason behind every crash. Unfortunately, statistics show that's usually not the case, particularly with transport category aircraft.
Here's the METAR for the time of the accident:
KBHM 140953Z 34004KT 10SM FEW011 BKN035 OVC075 23/22 A2997 RMK AO2 SLP141 T02330222
Weather, on first glance, does not appear to be a significant factor in terms of ceiling or visibility. It was an early flight though, so low light conditions may come in to play.