Prohibited Ops, Drugs & Alcohol
~10 min read · Apply careless/reckless, the 8-hour bottle rule, 0.04 BAC, and refusal consequences.
A short list of behaviors ends Part 107 privileges outright: careless operation, dropping things on people, flying impaired, and interfering with emergency response. The alcohol numbers — 8 hours and 0.04 — are near-certain exam material.
Careless or reckless, and dropped objects
107.23 prohibits operating an sUAS in a careless or reckless manner that endangers life or property — the FAA's catch-all charge, and it cannot be waived. It also prohibits allowing an object to be dropped from the sUAS in a way that creates undue hazard to persons or property. Dropping is not banned outright — a fishing line delivered over open water is fine; a promotional item dropped over a sidewalk crowd is not.
Alcohol and drugs: the hard numbers
You may not act as remote PIC, VO, or manipulator of the controls within 8 hours of consuming alcohol, while under the influence, or with a blood alcohol concentration of 0.04% or greater. Using any drug that affects mental or physical faculties disqualifies you for that operation. Refusing a lawful request for an alcohol test, or refusing to release results to the FAA, is grounds for denial of an application for up to one year, and suspension or revocation of an existing certificate.
- 8 hours bottle-to-throttle
- BAC limit: 0.04 (half the common driving limit)
- Impairing medication (including many OTC drugs) = grounded
- Test refusal: up to 1-year application denial + suspension/revocation
Interference and other prohibitions
Operations may not interfere with emergency response activities — wildfire suppression, law enforcement scenes, disaster relief (TFRs usually formalize this, but the prohibition stands even without one). No operation of multiple sUAS by one pilot without a waiver, no operations from a moving aircraft ever, and no carriage of hazardous materials. Violations bring civil penalties and certificate action; interfering with wildfire fighting can bring separate large fines.
Worked example
At 9 p.m. a pilot finishes two beers. At 4:30 a.m. he is called to fly a dawn search pattern for a missing hiker — a sheriff's helicopter is also working the area. He feels fine. May he fly at 5 a.m.?
Two tests apply. Time: 8 hours from last drink at 9 p.m. runs to 5 a.m. — a 5 a.m. launch is exactly at the boundary, so he is legal on the 8-hour rule only if he waits until 5:00 and is not under any residual influence with BAC under 0.04. Coordination: a manned helicopter is operating; his sUAS must yield right of way, and if authorities have restricted the area for the search, flying without coordination would be interference with emergency response. The safe exam answer: wait past 8 hours, confirm BAC/no impairment, and integrate with the incident commander before launching.
Common exam pitfalls
Applying the 0.08 driving limit to flying.
Aviation uses 0.04 — and the 8-hour rule applies even if your BAC is 0.00.
Thinking test refusal is a neutral right with no consequence.
Refusal itself triggers up to a 1-year denial of applications plus suspension or revocation of what you hold.
Believing dropping any object is illegal.
Only drops creating undue hazard are prohibited — controlled delivery over a safe area is legal.
8 hours, point-oh-four, drop nothing on people, stay clear of the fire line.
Recap
- Careless/reckless operation is prohibited and unwaivable
- Object drops are legal only when they create no undue hazard
- Alcohol: 8 hours minimum, BAC < 0.04, no impairment
- Test refusal → up to 1-year application denial + suspension/revocation
- Never interfere with emergency response or wildfire operations
- One pilot, one sUAS (absent a 107.35 waiver); no ops from a moving aircraft
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