Alcohol & Drugs
Alcohol, Drugs, and Part 107
For alcohol and drug fitness, § 107.27 makes the remote PIC, person manipulating the controls, and visual observer subject to § 91.17. Its prohibitions are independent: no alcohol within 8 hours, no operation while under the influence, no drug use that affects faculties contrary to safety, and no alcohol concentration of 0.04 or greater in blood or breath.
| Substance rule | Part 107 requirement |
|---|---|
| Alcohol — time | No consumption within 8 hours before operating |
| Alcohol — influence | No operation while under the influence, even after 8 hours |
| Alcohol — concentration | No operation at 0.04 or greater in a blood or breath specimen |
| Prescription drugs | If the label says 'do not operate machinery,' do not fly |
| OTC medication | Even common medications (antihistamines, cold medicine) can impair |
| Any substance | If it affects your judgment, coordination, or alertness — you are grounded |
8-hour rule is a floor, not a ceiling
Even if 8 hours have passed, if you still feel any effect from alcohol — you are not legal to fly. 'Hung over' is impaired.