Restriction or suspension of operation: Supplemental operations

This regulation requires both the airline (certificate holder) and the pilot in command to stop or limit flight operations whenever they become aware of hazardous conditions. These hazards specifically include airport and runway conditions, but the regulation also covers other dangerous situations more broadly.

The key requirement is simple: if you know conditions are unsafe, you must restrict or suspend operations until the problem is fixed. This applies whether you're the airline's management or the pilot flying the trip.

In practice, this means a pilot can refuse to operate into an airport with icy runways, inadequate lighting, or other hazards, and the airline cannot pressure them to continue. Similarly, airline management must ground flights when they learn of dangerous conditions. Operations can only resume once the hazardous conditions are corrected. This regulation provides clear authority to prioritize safety over schedule.

*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.*