I think it is quite possible especially when 6 of the top 6 airlines in terms of fleet size all have a large amount of Boeing aircraft in them. I don't know if the 7E7 will be the plane to push Boeing past Airbus, but maybe Boeing's reliable best seller again.
I am assuming the fleet sizes are like this, I may be dated correct me if I am wrong
1.
AA
2.
UA
3. Delta
4. Northwest
5. British Airways
6. Continental
Two of those airlines have NO Airbuses in them and another one is most likely going to get rid of their A300s in a couple years. As of right now those three airlines cannot afford new aircraft, but give them a few years.
Its almost a given that once
AA can afford the 7E7 they will buy it. You might see an early order for about 35 7E7s to replace the A300, then later several more to replace the 767s and maybe some 757s. What about when Stage
IV goes into effect? I guess
AA could hushkit the
MD-80s or will they order more 737NGs? Unless they want to be like Northwest and fly aging aircraft. Some of those
MD-80s are getting close to 25 years old.
UA I think will stay with Boeing for widebodies, but stay with Airbus for narrowbodies. I don't see
UA switching unless
UA suddenly gets really profitable and gets a pro Boeing CEO in to replace the A32X and 733/735 with 737NG or vice versa replaces the rest of the 733/735 with more A32X and starts replacing 767/747/777 with Airbus widebodies. Otherwise I think there will eventually be more A32X to replace the rest of the 737s and maybe 757s and 7E7s to replace the 767s.
Delta, if they last will also have to eventually replace those
MD-80s, 757s and 767s. Once again there is a potential big 737NG and 7E7 order down the road there.
Northwest I see leaning more Airbus. I dont even want to start a DC-9 replacement thread, but you can factor the 717 out now and I highly doubt they are going to switch to the 737NG with the large fleet of A32X aircraft (I believe
NW is the largest operator of the A32X series)
BA same as
UA except
BA is in better financial position
Continental- Well Bethune is gone, but I don't see
CO making any radical changes to Airbus and they already ordered some 7E7s. I see more 737NGs coming onboard too to replace the last of the older 737s.