Erik Gunnes wrote:
"Dammaged spaceshuttle. NASA has discovered what might be a dammage to the
spaceshuttles wing. The outer tiles in the heat-shield are black. On immages
a white spot is also visible. That might indicate that something has fallen
off the wing. Nasa are later to day to decide if the dammage to "Discovery"
is so big that it has to be repaired, Reuters reports "......

This is basically true. Some of the tiles are probably chipped.
However, calling the chip "parts" is a pretty extremist interpretation.
I'd call an elevon or landing gear door a "part".

Lee Jay