AA LOSS OF $436M

American Airlines parent AMR Corp. yesterday reported a first-quarter net loss of $436 million, narrowed from a $505 million net deficit for the same period last year. First-quarter revenue rose 9.2% year on year to $5.53 billion while expenses heightened 7.4% to $5.77 billion, including a 24.8% surge in fuel costs to $1.84 billion. Operating loss was $232 million, narrowed from an operating loss of $298 million in the 2010 March quarter. Mainline traffic increased 1.6% to 29.17 billion RPMs on a 2.7% lift in capacity to 37.85 billion ASMs, producing a load factor of 77.1%, down 0.8%. Passenger yield