"Pete" wrote in message
news
They were taking the pylon off with the engine, rather than removing
the engine from the pylon. Reattaching them involved impacts that
the pylon wasn't designed to cope with, and caused cracking.

AA weren't the only culprits, and were not the only ones fined for
doing that.

AA, Continental, and Braniff, I think. But American developed the
practice, which Continental later adopted.
\
Braniff never flew DC10's, and their 747 maintenance was largely contracted
out (up til about 1980, they only had 1)


Pete