Aviation safety inspector's credentials: Admission to pilot's compartment

When an FAA aviation safety inspector presents their official credentials (Form FAA 110A) to the pilot in command during an inspection, the regulation requires that the inspector be given immediate and unrestricted access to the flight deck.

This applies to aircraft operated under Part 121 (scheduled air carriers and commercial operators). The inspector doesn't need advance permission or coordination—presenting the credential is sufficient. "Free and uninterrupted access" means the pilot in command cannot deny entry or delay the inspector's ability to observe flight operations.

In practice, this allows FAA inspectors to conduct oversight activities such as observing crew procedures, checking compliance with regulations, and evaluating operational standards in real-time. The regulation ensures inspectors can perform their safety oversight duties effectively without obstruction, which is essential for maintaining the FAA's ability to monitor air carrier operations and enforce safety standards.

*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.*