Hawaiian Airlines took delivery on Tuesday of its fourth Airbus A330-200 this year. It is the ninth A330 overall to join the airline’s fleet since June 2010 when it began its long-haul fleet expansion.

Hawaiian will take delivery of 13 additional new A330s between 2013 and 2015, bringing to 22 the total number of A330s in its fleet.

Separately, Hawaiian said in a regulatory filing Wednesday that it expects to report in the second quarter a higher rate of growth in passenger and operating revenue per available mile, an increase in passenger load factor (percentage of seats filled) and an increase in cost per available seat mile excluding fuel and aircraft lease termination costs.

"The improvements in the company’s passenger and operating revenue per available seat mile and passenger load factor are attributable to demand strength throughout the company’s network, with expected improvement relative to previous guidance for its international routes," the company said in an 8-K filing with the Securities and Exchange Commission.

"The increase in the company’s cost per available seat mile, excluding fuel and non-recurring lease termination costs, is primarily attributable to an increase in maintenance, materials and repairs expenses due to previously unanticipated engine overhaul costs."

Hawaiian’s stock rose 16 cents, or 2.5 percent, to $6.48 on Wednesday. The filing was made before the market opened.