More from that last site:

Searchers found one of the large engines from the aircraft "at a considerable distance from the crash site, by a garden wall."

"It appears to be the whole engine," he added.

Szupinka said most of the remaining debris, scattered over a perimeter that stretches for several miles, are in pieces no bigger than a "briefcase." (archived at http://library.triblive.com - search whole engine from 9-10-01 to 9-20-01 or read it here)

Crowley related that 95 percent of the airplane had been recovered. The biggest piece of aircraft found was a fuselage skin measuring about 6 to 7 feet. The heaviest piece was from one of the engines and weighed 1,000 pounds. http://www.dailyamerican.com/disaster.html#final

Comment: It's important to recall that every description of the main crash site is that the airplane was OBLITERATED. Very small debris was spread over a couple hundred yards. This is exactly what you'd expect to see when an Airliner impacts nearly vertically as Flight 93 did. Nothing survived this impact... yet a 1000lb fan was found elsewhere. It fell off before impact, just like Flight 587's engine that was found basically intact did.