In an interview, Barger said, "We have six network carriers," namely American, United, Delta, Continental and Northwest in addition to US Airways.
"Do we really need six network carriers in this country?" he asked.
US Airways' situation drew scrutiny on Friday from members of the loan board, which has been monitoring the company's travails.
Last year, the board agreed to guarantee US$900 million in loans to US Airways, forming the basis of its restructuring. In return, US Airways pledged planes, gates, routes and collateral worth twice the loans.
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