The National Transportation Safety Board released the preliminary report for a Delta Air Lines flight from Atlanta to Charleston that had to be evacuated after smoke filled the cabin.

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.

Investigators found no oil in the right-side Rolls-Royce BR715-C1 engine of a Delta Air Lines Boeing 717 following an emergency landing in February that involved a "tremendous" amount of cabin smoke.