FAA FOIA ‘No Records Determination’

Well this is a rather interesting but short post today…

In December, US Freedom Flyers discovered that the Guide for Aviation Medical Examiners amended the PR interval threshold at which cardiovascular evaluation was required. The FAA claimed that ‘New scientific evidence enabled the FAA to safely raise the tolerance used to screen for a certain heart condition.’ in a response included in Senator Johnson’s letter dated 01/27/2023.

This is the ‘No Records Determination’ to a FOIA request shared with USFF. What evidence was used to make the change to the threshold, and what evidence has been collected since the change to verify the safety of the decision?

https://twitter.com/USFreedomFlyers/status/1681495150864859136?t=Jaqayo-8CGknGXaIaInikA&s=19