Restriction or suspension of operations: Continuation of flight in an emergency

This regulation requires Part 135 operators and pilots to restrict or suspend operations when they become aware of hazardous conditions, including problems with airports or runways. Safety comes first—you must stop or limit operations until the hazard is resolved.

If you're already airborne and headed to your destination, you cannot continue toward that airport under hazardous conditions unless you reasonably expect those conditions to improve by your arrival time. The only exception is if continuing is actually the safest option available—but this triggers the emergency authority under §135.19, meaning you're declaring an emergency situation.

In practice, this means you must actively monitor conditions and make go/no-go decisions both on the ground and in flight. If your destination airport develops dangerous conditions (weather, runway closure, etc.), you need an alternate plan unless the problem will clear up before you arrive or diverting would be even more dangerous.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*