Alcohol, Medical Fitness, and Emergencies

Part 107 doesn't have a single "pilot fitness" rule. It has three separate ones, alcohol and drugs, medical condition, and in-flight emergency authority, each answering a slightly different version of the same underlying question.

How strict is the alcohol and drug rule?

14 CFR §107.27 requires anyone manipulating the flight controls, acting as remote pilot in command, or acting as a visual observer to comply with 14 CFR §§91.17 and 91.19. Under §91.17 that means no flying within 8 hours after consuming any alcoholic beverage, none while under the influence of alcohol, none while using a drug that affects your faculties contrary to safety, and none with an alcohol concentration of 0.04 or greater. §91.19 separately bars operating an aircraft with knowledge that narcotic drugs, marijuana, or depressant or stimulant drugs are carried on it, unless authorized under law. "I feel fine" isn't the test: the 8-hour and 0.04 lines are objective, whatever you think of your own state.

Does Part 107 require a medical certificate?

14 CFR §107.17 prohibits manipulating the controls, or acting as remote pilot in command, visual observer or direct participant, if you know or have reason to know you have a physical or mental condition that would interfere with the safe operation of the aircraft. Unlike manned aviation's medical certificate system, Part 107 doesn't require a medical exam or a standing certificate. It requires an honest, ongoing judgment about whether a current condition interferes with this flight, right now. A medication that affects your faculties contrary to safety is also a drug question under §91.17.

When can an emergency override other rules?

14 CFR §107.21 addresses what happens when an emergency requires deviating from Part 107's other operating rules to the extent necessary to meet that emergency. This isn't a loophole; it's a recognition that a genuine emergency, a lost link, a mechanical failure, an unexpected hazard, can require a response that the normal operating rules didn't anticipate, and the regulation explicitly permits that deviation rather than leaving a pilot choosing between following the rule and responding to the emergency.

Who does each rule cover?

Reading a scenario against this table answers most questions on the cluster: who is involved, and which standard applies.

What connects all three

Alcohol and drugs, medical condition, and in-flight emergency authority all center on the same real question underneath the regulatory language: can this pilot, in this specific moment, actually exercise sound judgment and control. Two of the rules restrict when a pilot may fly at all; the third defines how much flexibility a pilot has once something goes wrong mid-flight. Exam scenarios on this cluster usually test whether a candidate can tell which of the three is actually in play, rather than reaching for the same answer regardless of what the scenario describes.

These fitness rules pair with aeronautical decision-making and physiological effects, and the certificate itself has eligibility limits covered in Part 107 renewal and eligibility.

The full regulatory language and drills for this area are in the handbook.

In-flight emergencies with the aircraft itself, such as a lost link, a flyaway or a battery fire, are covered in the drone emergencies post.