FedEx Corp. is showing signs of strain from the mandatory grounding of its MD-11 freighter fleet during the year’s busiest shipping season as travel managers are unable to keep up with an unprecedented number of flight changes, leaving many arriving pilots without confirmed accommodations after long trips. Hotel and ground transportation reservations are typically made weeks, or months, in advance of a trip, but FedEx (NYSE: FDX) acknowledged that the department responsible for booking those services for ...