F or more than a century, aviation regulation has revolved around a single assumption: a human being sits in the cockpit. Under the authority of the Federal Aviation Administration and within frameworks like 14 CFR Part 91, 14 CFR Part 121, and 14 CFR Part 135, accountability has always resolved to a person. The Pilot in Command. Not the autopilot. Not the manufacturer. Not the architecture. The human being. That structure did more than define rules. It shaped culture. It sha