[gordner]

I am an aircraft maintenance engineer, and understand some of what comes out of the NTSB. The condition of the engines was in a "maintainer" article I read awhile back.
As for destructive failure, the engines were powered back by the aircraft systems to try to reduce them being further damaged. As a result, a 100 million dollar plus airframe was dumped in the river and both the airframe and engines destroyed, so who really cares if they had suffered more damage due to continuing to pull power? They pose very little risk to the airframe during a failure, they are designed to come apart without risking the aircraft.