American Airlines (AAL) reported first-quarter earnings above Wall Street expectations Friday, but the strong dollar and capacity growth hurt revenue. The carrier’s earnings jumped 220% to $1.73 per share. Analysts polled by Thomson Reuters were expecting $1.71. Revenue dipped 1.7% to $9.8 billion, in line with views. “While core demand remains healthy, first-quarter 2015 revenue was impacted by competitive capacity growth, a stronger U.S.