A remote pilot in command deviates from a 14 CFR part 107 operating rule to respond to an in-flight emergency, as permitted by § 107.21. When must the pilot report that deviation to the FAA?

Why: 14 CFR § 107.21(b) requires a remote PIC who deviates from a rule to respond to an emergency to send a written report of that deviation only upon request of the Administrator — unlike the mandatory, unconditional 10-calendar-day reporting window in § 107.9 for safety events meeting the injury or property-damage thresholds.

• Confuses the emergency-deviation reporting rule (§ 107.21) with the separate, mandatory § 107.9 safety-event reporting window, which does not apply to deviations by itself.
• Invents an immediate-reporting requirement that does not appear in either § 107.9 or § 107.21; neither rule requires a report before the flight continues.