Peekay4 is probably correct about the aircrew health records being kept confidential for 81 years, as they may still live until 2073. Lufthansa/Germanwings kept the medical records of Andreas Lubitz all too private when disclosure might have been more appropriate.
As for McDonnell-Douglas, now swallowed up by Boeing, are any of the Douglas aircraft still flying passengers? A-FLOOR points out that the breakup and inversion of the fuselage after the hard touchdown and failure of the undercarriage was due to "a critical and unforgivable design flaw"...if any of these machines are still flying, they must be difficult to insure.