Boeing and Airbus executives believe that the combined fleet of a potential merged US Airways-American Airlines will be large enough to be dual source.
The two carriers, which announced their intentions to merge on 14 February, have few commonalities between their fleets. US Airways operates a mostly Airbus fleet while American's in-service aircraft are mostly from Boeing.
The proposed merged carrier will operate 948 mainline aircraft.
Airbus Americas' director of business operations Simon Pickup said that the airlines' combined fleet is "large enough to be dual-source". Speaking at the Aviation Forecast and Policy Summit in Washington DC on 7 March, Pickup noted that American holds substantial orders for both the Airbus A321neo and Boeing 737 Max.
American has orders for 130 A321neos and 100 737 Max aircraft.
Boeing's chief analyst for aviation system analysis Robert Peterson said fleet commonality is critical only for a combined fleet size of 200 or fewer aircraft.
"We see evidence that they also value dealing with two players in a duopoly," said Peterson. "It's clear that airlines see value in some diversity there."
US Airways chief executive Doug Parker has played down concerns over the two carriers' fragmented fleet. Echoing the sentiments of the airframers, he said that fleet simplification will not add much value because the two airlines' combined fleet would be large enough on 4 March.