What happened
On May 25, 2013, at approximately 0810 UTC, a Boeing 777 operated by Transaero was climbing from Vnukovo-Moscow enroute to New York John F. Kennedy International Airport. During this phase of flight, the No. 1 engine, a Pratt & Whitney PW4090, exhibited increasing vibrations and rising exhaust gas temperature. This was followed by an engine fire warning.
The crew responded by shutting down the engine and diverted the aircraft, registration EI-UNW, to Sheremetyevo-Moscow. There were no injuries resulting from the incident.
The investigation
An examination of the engine conducted after landing revealed no evidence of fire damage. However, investigators identified three broken 2nd stage turbine blades.