Incident: Delta B764 at Atlanta on Jan 3rd 2018, sound like engine compressor stall

Incident: Delta B764 at Atlanta on Jan 3rd 2018, sound like engine compressor stall

A Delta Airlines Boeing 767-400, registration N828MH performing flight DL-284 (sched. dep Jan 2nd, actual dep Jan 3rd) from Atlanta,GA (USA) to London Heathrow,EN (UK) with 228 people on board, had replaced N830MH, which had returned earlier following an engine compressor stall, see Incident: Delta B764 near Atlanta on Jan 2nd 2018, engine compressor stall. The aircraft was climbing out of Atlanta's runway 09L when the crew stopped the climb at FL290 due to a loud bang similiar to an engine (CF6) compressor stall. The crew declared PAN, advised ATC of the sound similiar to an engine compressor stall but stated there had been no actual engine event. The aircraft returned to Atlanta for a safe landing on runway 09L about 80 minutes after departure.

The airline reported the passengers were taken to hotels.

Passengers reported both different crews on N830MH and N828MH told them there was nothing wrong with the aircraft, they were returning due to the loud bang heard.

The occurrence aircraft is still on the ground 11 hours after landing back.