Atlantic Southeast Airlines resumed full operations Thursday, after grounding 60 planes for safety inspections, according to an Associated Press report.
The SkyWest subsidiary and Delta feeder carrier said the groundings led to the cancellation of 277 flights.
Early Wednesday, ASA said it had grounded some of its 50-seat Bombardier CRJ200 jets after an internal audit raised questions about whether the planes' engines had been properly inspected according to manufacturer's guidelines. The re-inspections were done as a precaution, the airline said.
The groundings represented nearly 40% of ASA's total fleet. As of Thursday afternoon, most of the grounded planes were back in service, though a few were still being inspected, spokeswoman Kate Modolo said. Flight operations were not being impacted by those planes that remained out of service, she said. The remaining inspections were expected to be complete Thursday.
According to its website, Atlanta-based ASA also has 38 70-seat Bombardier CRJ700 jets and two 76-seat Bombardier CRJ900 jets.
Atlanta-based Delta sold ASA to St. George, Utah-based SkyWest in 2005. ASA remains a regional carrier for Delta, the world's biggest airline operator.