[txhurl]

Images show that the fan cowl doors on both engines have been torn away,

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Both engines, eh? Must have been a sizeable geese flock.

[Yo-Yo]

Both engines, eh? Must have been a sizeable geese flock.

It's looking like ground maintenance failed to properly latch the engine covers, and they blew off both engines during the first few minutes of flight.

Video from onboard: http://www.guardian.co.uk/world/video/2013/may/24/heathrow-emergency-landing-from-plane-video