Issue with crew scheduling system causes cancellations for American Airlines subsidiary

A technical issue with the crew scheduling and tracking system for an American Airlines Group Inc. (NASDAQ: AAL) subsidiary caused cancellations and delays for dozens of flights Sunday with issues stretching into Monday.PSA Airlines, headquartered in Dayton, Ohio, cancelled about 70 flights on Sunday in Charlotte, North Carolina, an American spokesperson told the Charlotte Observer. Charlotte has been hit particularly hard by the technical issues as it's a major hub for PSA. The airline operates