Fort Worth-based AMR Corp. (NYSE: AMR), parent of American Airlines, was the first major U.S. airline company to report first-quarter results, and it posted a loss of $1.32 per share. Revenue rose 5% to $5.7 billion. Analysts surveyed by Thomson Financial had expected a loss of $1.34 per share on revenue of $5.73 billion.

Filling seats wasn't American's problem -- average occupancy hit a record 79.1% percent in the quarter. Average fares paid rose 5.1%, as airlines raised ticket prices. But executives said they were concerned about the weakening economy and even more worried about skyrocketing fuel costs. American's fuel spending jumped 45%, offsetting further increases in revenue.

American announced that it will be cutting U.S. capacity by 3.6% this year and selling 90% of its investment arm, American Beacon Advisors. The company also expects to sell or spin off its American Eagle regional airline this year to raise additional cash.

American is also speeding the replacement of its fleet with more fuel-efficient Boeing (NYSE: BA) 737-800s, taking delivery of 30 new planes in 2009 and 2010 instead of the previously planned 23.

AMR shares rose 35 cents, or 4.1%, to $8.92 in trading Wednesday.