3201-3206, First 6 320s online at NW
... Have a slightly different config. for fueling purposes, fuel panel in access panel at wing root. Fueler stands on ground to access this. All over fuel panel underwing (14-15ft up) accessed by way of lift on fuel truck.
3207-3250 - Remaining A320s in the initial delivery of 50 Airbuses (early-mid 1990s)
3251-3280something.... - Next batch of A320s ordered by NW
. These aircraft have the slimline seats in coach. Later numbers (eg ship 3275 have led backlighting on cabin exits and overhead exit signs, looks paper white instead of an incandescent light source).
3101-31?? - These are all identical in seating like A320 ships 3251 and higher. Slimline seats, including a slightly different first class seat thats not as plush as the earlier A320s. Least comfortable of the Airbus family at NWA. Avoid the last row as theyre cramped and do not recline. Longest route NWA uses this on I believe is DTW
...blocks at 5:07.. Yeow.... worked it once... feels like a short intl flight.