A copy of the post-flight mission report is available here.
The relevant portion states
The TPS sustained a significant amount of debris hits from the right-hand chine
area aft to the right-hand wing. A tile loss (V070-391015-193) occurred on the
lower right-hand side of the fuselage at station Xo -390, Yo60. Structural
damage was confined to the cavity over a small antenna access door. The tin
plating on the aluminum door was melted with aluminum appearing to be half-way between hardened and annealed. The door also had a small buckle.
The antenna door was over a TACAN lower antenna, found by matching the coordinates given above to a Space Shuttle Systems Handbook drawing.
A large, but poorly reproduced black and white picture of the damage can be found in the postflight TPS report.
along with this sketch
This report is more focused on figuring out where the impacting debris came from, than describing the damage. It calls the antenna an L-band antenna but apparently that band includes TACAN.
A tiny color reproduction of the image appears in Volume 1, Chapter 6 of the CAIB Report. I have rotated it here to match the orientation in the other reports. The link is to a low-res pdf in which the picture is even worse than it appears here.
The recent book Space Shuttle Stories contains the best reproduction of this image I've seen; I scanned this picture from there.
Loss of a single tile, while concerning, was not necessarily catastrophic. As early as STS-001, multiple tiles were lost off the OMS pods.