The crew of a Qatar Airways Boeing 777-300, registration A7-BAA performing flight QR52 from Washington,DC (USA) to Doha (Qatar) last Sept 06 2008, declared emergency due to an engine failure about 175nm west of Gander while enroute at FL370 and requested a descent to FL200. After the descent to FL200 the flight deck crew dumped fuel and diverted to Gander,NL (Canada). The airplane landed safely at Gander about 50 minutes after the engine failure.
The crew had attempted a relight of the engine, during which the EGT limits were exceeded. Subsequent inspection after landing revealed tiny particles in the tailpipe and debris on chip detectors. The engine (GE90-115B) was removed and sent to the manufacturer for further analysis.
A replacement aircraft, an Airbus A330-200, registration A7-ACA was dispatched to Gander as flight QR3052 to pick the passengers up and bring them to London Heathrow.