My sources tell me it was the 6th and 7th stage compressor that went bang! Several rotor blades a lot smaller now than they were designed to be. No obvious cause, probably will have to wait for a full workshop strip down for that. The crew throttled the engine back to idle after hearing (feeling?) two loud bangs and high vibration whilst climbing thru FL290.
Overweight landing and a very nice professional job allround.
Well done to f/crew and ATC for a well handled PAN.
Oh yes and well done to the engineers who worked in the freezing cold to assess the problem quickley.
