STBYRUD,
Apparently you are getting an 8% error in your radalt. That seems excessive. Don't manufacturers quote 2 or 3 % max? That error would diminish as you descend, as manufacturers quote a max error of 1 foot on the ground. In the FDR file in question the error does not diminish, it increasess as the plane descends, so does not seem to be due to radalt error.
Checkboard,
Yes, this is about flight AA77 which went into the Pentagon. The pilots who are saying the altimeter is more accurate than the radalt are trying to make the case that the plane flew over the Pentagon and that the damage was done by other means, thereby casting suspicion on the authorities. The pilots have an effective website and have convinced a lot of people, which I find pretty annoying.
john_tullamarine,
No, the FDR file was released to the public by the NTSB. Anyone can get it. What seems to be hard to get is the altimeter calibration data.