On Wed, 20 Dec 2006 06:28:01 +1100, "Conscious Pilate"
wrote:

The Kalitta Air jet took off from O'Hare International Airport in Chicago
late Wednesday. It later reported mechanical problems in one of Its engines,
a Federal Aviation Administration spokeswoman in Chicago said.
The Boeing 747 was able to fly, but was diverted as a safety precaution to
Detroit, where it landed without incident, FAA officials said. No one was
injured.
After the landing, airline personnel discovered the engine was completely
gone, FAA officials said.
Michigan authorities searched Thursday for the engine, which may have fallen
into Lake Michigan, the FAA said. The FAA will Investigate the incident, but
the results of an investigation could take weeks.


Looking at picture 20159, you will notice that #2 engine is off it's
axis - pointing inboard. Makes me think this is a possible mid-air as
I cannot conjure a scenario where the outboard (and more aft) engine
could do this. Especially considering that the photo (28297) of #1
pylon indicates an up, outboard and aft rotation of the separated
engine.

J. W. Alger