FlightAware Discussions

Incorrect altitude

Where does it come from that the barometric altitude is way off reality?
Is this part of the ADS-B signal coming from the aircraft?

Bad transponder. Happens.

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The old tape over the static port (for aircraft washing) trick, maybe?

Saw this re-enacted in a play, Charlie Victor Romeo(CVR) about 15 years ago (in NYC).
One of many that I had already read about or seen on TV.