NASHVILLE, Tenn. (AP) — A Delta flight from Atlanta to Chicago had to make an emergency landing in Nashville after hitting turbulence that caused an engine covering to come off.

News outlets report that Delta Flight 762 was flying above Cleveland, Tennessee, on Sunday afternoon when the plane hit turbulence, causing the Boeing 717's engine lights to turn on.

Delta says in a statement that the outermost covering of the plane's right engine, or cowling, had come off.

The plane's crew declared an emergency for priority air traffic control handling to Nashville. Delta says the aircraft landed safely and taxied to the gate normally. All 109 customers on board left the plane safely.

Delta says it will investigate the incident.