American Airlines subsidiary Envoy Air, which operates American Eagle-branded regional flights, says it is working with the FAA and the Air Line Pilots Association union to address safety concerns identified by the FAA.
"If issues are raised -- either internally by our team or by the FAA -- we work to address them immediately," Envoy said in an emailed statement. "Since January, Envoy's flight operations and safety teams have been working closely with the FAA and the Air Line Pilots Association to transparently and collaboratively examine the root cause of each potential issue and take any necessary corrective actions if needed."
The concerns were laid out in a January letter of investigation sent to Envoy by the aviation safety agency and obtained by CNN.
The FAA declined on Wednesday afternoon to elaborate on the issues that prompted the letter. The agency also said it does not release documents during a pending investigation, but it added that it is providing oversight as Envoy addresses concerns spelled out in the letter.
Related: Regional airlines finding ways to recruit and train pilots
"Our safety oversight programs are set up to identify issues at the earliest possible point and get ahead of them. This is why flying is as safe as it is," the FAA said.
According to Envoy's website, the carrier operates more than 185 aircraft for American Eagle on 1,000 daily flights to 150 destinations.
CNN cited examples of incidents the FAA laid out in the letter of investigation. In one case, an Envoy flight was seconds away from landing at an airport in Illinois last March when the pilots realized they were aimed at the wrong runway.
In another case, a November 2019 Envoy flight sild along a snowy runway at Chicago O'Hare upon landing. The FAA faulted air traffic controllers in that case for not providing proper weather information and also fined the Chicago Department of Aviation for failing to ensure safe airline operations during the winter storm. But, CNN reported, the agency also determined that other flight crews had aborted plans to land after seeing the challenging conditions.
In its January letter, the FAA told Envoy that over the past two years it had found, "consistent evidence showing potential lack of airmanship," CNN reported.