Under 14 CFR § 107.15, who is responsible for checking that a small unmanned aircraft system is in a condition for safe operation before each flight?

Why: 14 CFR § 107.15(a) states: "Prior to each flight, the remote pilot in command must check the small unmanned aircraft system to determine whether it is in a condition for safe operation."

• Shifts the preflight safety-check duty to the visual observer, but § 107.33 defines the observer's role as scanning for traffic and maintaining awareness of the aircraft's position, not checking its safety condition.
• Confuses the manufacturer's one-time declaration of compliance (subpart D, for operations-over-people eligibility) with the remote pilot's own preflight duty under § 107.15, which applies before every flight regardless of DOC status.