For what it is worth, Ancestry.com has the U.S. Navy Burial Records Book 1898 to 1932 (hand written) which shows a line for both Byrd and the next line for Frankforter. In the column headed Cause of Death both have "Crash of O2B Plane" listed
For those with Ancestry access:
https://www.ancestry.com/discoveryui...view/2539:3014