Sounds like the American airlines flight forgot to set their altimeter for local air pressure.
Specialist_Sound9738 on
If the helo was flying VFR and told to pass behind. .. which they were… none of this altitude data is relevant. The helo was at fault even if the CRJ altimeter was turned completely off. Full stop.
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SS
A discrepancy has been found in the altitude data of the two craft involved in the DC air incident of January 29.
[https://www.independent.co.uk/news/world/americas/dc-plane-crash-washington-altitude-data-b2691302.html](https://www.independent.co.uk/news/world/americas/dc-plane-crash-washington-altitude-data-b2691302.html)
Sounds like the American airlines flight forgot to set their altimeter for local air pressure.
If the helo was flying VFR and told to pass behind. .. which they were… none of this altitude data is relevant. The helo was at fault even if the CRJ altimeter was turned completely off. Full stop.