Because the pressure altitude parameter is invalid ... The cockpit voice recorder and flight data recorder from both aircraft are currently being examined in the NTSB laboratories.

which includes reaching out to the Army as well as Sikorsky Aircraft and Collins Aviation ... "We are working to determine if this bad data for pressure altitude only affected the [flight ...

When the Blackbird entered service with the Air Force in 1966, it was simply too advanced for existing fuel and navigation systems.

Adam, using the Bristol 138 experimental high altitude aircraft. This was the same machine ... The pilot wore the actual high-pressure suit that was prepared as a reserve for the previous record ...