 Twenty Boeing 727s were leased from the BRNF Liquidating Trust as a result of the original December 15, 1983, lease agreement and the remaining four were leased from outside lessors.Ten Boeing 737s were leased from Polaris and the remaining four were subleased from American Airlines via Core Holdings, a wholly owned subsidiary of BIA-COR Holdings.All eighteen BAC One-Eleven twinjets were leased from outside leasing entities.