1.   Such systems offer scope to allow aircraft maintenance engineers to transfer between aircraft types more easily.

2.   BA has been one of the most aggressive airlines in cutting costs in recent years and flies only a few different aircraft types to save training and maintenance expenses.

3.   BA, one of the most aggressive airlines in cutting costs in recent years, flies only a few different aircraft types to save training and maintenance expenses.

4.   Delta currently has different interior designs for each aircraft type, and the plan is to standardize fabrics and colors.

5.   Executives at some carriers acknowledge mild interest in buying small numbers of certain aircraft types to perform specialty niche missions.

6.   Having fewer aircraft types saves money in maintenance and operations.

7.   However, Airbus or any other potential competitors to Boeing would have to offer strong incentives to airlines to complicate their fleets with new aircraft types.

8.   In addition, it will reduce from seven to four the number of aircraft types flown by Continental.

9.   Most large U.S. carriers have cited the need in recent years for a simpler fleet with fewer aircraft types.

10.   Most major U.S. carriers have cited the need in recent years for simpler fleets with fewer aircraft types.