After a Delta flight made an emergency landing in Atlanta​ in February, a maintenance crew found there was barely any or possibly no oil in the aircraft's right engine, an NTSB report said.

No oil was visible in the gauge on the right engine’s oil reservoir after a February Delta Air Lines flight filled with smoke during takeoff at Atlanta’s Hartsfield Jackson International Airport, a preliminary report from the National Transportation Safety Board said Wednesday.

Smoke that filled the cabin of a Delta flight as it took off from the Atlanta airport in February was so thick the lead flight attendant had trouble seeing past the first row of passengers and the pilots donned oxygen masks as a precaution.