Q: Who was in charge of FCC when this 5G/altimeter problem should have been addressed?

[pnwmom]

11. The FAA didn't wait. Their concerns were expressed by 2019.

https://transportation.house.gov/news/press-releases/chair-defazio-calls-on-fcc-to-postpone-tomorrows-scheduled-auction-of-a-portion-of-37-42-ghz-radio-frequency-spectrum-citing-new-research-that-amplifies-the-safety-concerns-of-the-aviation-community

This is from a piece on Dec. 7, 2020:

Chair DeFazio first brought safety concerns to the FCC’s attention more than a year ago, noting that both the Federal Aviation Administration and the greater aviation community feared that the intended use of this auctioned spectrum—wireless broadband—would interfere with sensitive aviation safety equipment and jeopardize aviation safety. Since then, the Radio Technical Commission for Aeronautics (RTCA) completed its six-month review and assessment of interference from 5G network emissions with safety-critical radio altimeter performance and found serious risks of harmful interference on all types of civil aircraft, including commercial airlines and general aviation airplanes and helicopters.