What happened
On May 30, 2018, at approximately 05:50 UTC, a Boeing 767-322, registration N671UA, operated by United Airlines, was performing a scheduled international flight from Washington Dulles International Airport to Geneva Airport. During the descent phase of the flight, the aircraft experienced a failure in the right-hand engine. This mechanical malfunction resulted in noticeable vibrations throughout the airframe.
As a result of the engine issue, the flight crew conducted the approach to Geneva Airport with the right engine operating at idle power. Despite the technical malfunction, there were no injuries to the 110 passengers or the 3 crew members on board, and no damage was reported to the aircraft or ground infrastructure.
The investigation
The Swiss Transportation Safety Investigation Board (SUST) opened an investigation into the incident to determine the nature of the engine failure and the resulting vibrations. The preliminary information focuses on the operational sequence during the descent and the status of the engines during the final approach to LSGG.