Aviation Drug & Alcohol Testing (DOT/FAA)

Aviation drug and alcohol testing is a workplace program, not an individual medical requirement. Its framework sits in two regulations that work together. 14 CFR Part 120 is the FAA's rule that establishes who must have a testing program, which functions are covered, and what types of tests are required. 49 CFR Part 40 is the Department of Transportation's government-wide rule that prescribes how the specimen collection, laboratory analysis, Medical Review Officer (MRO) review, and alcohol testing are actually carried out — the same procedures apply across all DOT modes (aviation, trucking, rail, transit, pipeline, and maritime).

The program attaches to the certificate holder — principally employers operating under a Part 121 or Part 135 air carrier or operator certificate, along with air traffic control facilities not operated by the FAA or the U.S. military. Those employers must test employees who perform "safety-sensitive" functions. Under Part 120 the covered functions are: flight crewmember duties, flight attendant duties, flight instruction duties, aircraft dispatcher duties, aircraft maintenance and preventive maintenance duties, ground security coordinator duties, aviation screening duties, and air traffic control duties. Contractors and subcontractors who perform these functions on the certificate holder's behalf are covered as well, which is why maintenance vendors and staffing arrangements are pulled into the program.

Part 120 requires several categories of test. Pre-employment testing (drug) must be conducted before an employee first performs a safety-sensitive function. Random testing selects employees by a scientifically valid, unannounced method spread across the year. Post-accident testing follows an accident under defined circumstances. Reasonable-suspicion testing (called reasonable-cause for alcohol) is triggered by trained supervisor observations of appearance, behavior, speech, or body odor. Return-to-duty and follow-up testing apply to an employee who is returning to safety-sensitive work after a violation, following the direction of a Substance Abuse Professional (SAP). Return-to-duty and follow-up tests must be directly observed.

The drug test is the DOT five-panel test defined in 49 CFR Part 40: marijuana, cocaine, amphetamines (including methamphetamine and MDMA), opioids (including codeine, morphine, heroin, and the semi-synthetic opioids hydrocodone, hydromorphone, oxycodone, and oxymorphone), and phencyclidine (PCP). A screening (immunoassay) test is followed by a confirmatory GC/MS or LC/MS test for any non-negative result, and an MRO reviews the result before it is reported as a verified positive. For alcohol, the concentration of concern is 0.04 breath alcohol concentration or greater, which is a violation; a result of 0.02 up to but below 0.04 requires the employee to be removed from the safety-sensitive function temporarily but is not itself a violation.

The minimum random testing rates are set by the FAA each year and published in the Federal Register. For the period January 1, 2026, through December 31, 2026, the minimum random testing rates are 25 percent of covered employees for drugs and 10 percent of covered employees for alcohol. The FAA can raise the drug rate to 50 percent (and the alcohol rate to 25 percent) if industry-wide positive rates rise above the regulatory thresholds, so operators should not assume the rate is fixed year to year.

This employer program is different from the individual airman prohibitions in 14 CFR 91.17, which apply to every pilot regardless of whether they work for a Part 121/135 certificate holder. Section 91.17 prohibits acting or attempting to act as a crewmember within 8 hours of consuming alcohol ("bottle to throttle"), while under the influence of alcohol, with a blood or breath alcohol concentration of 0.04 or greater, or while using any drug that affects the person's faculties contrary to safety. The 0.04 figure is common to both, but Part 120 is an employer-run testing obligation with recordkeeping and consequences, while 91.17 is a personal operating rule enforced through certificate action. A separate provision, 14 CFR 91.17(c), also allows a law-enforcement or NTSB request for testing following certain events.

A point of frequent confusion for training organizations: a flight school that only provides instruction under Part 61 or Part 141 — and does not hold or operate under a Part 121 or Part 135 certificate — is generally not required to run a Part 120 testing program, because the trigger is the air carrier/operator certificate, not the act of training. A school that also holds a Part 135 charter certificate, or a combined operation, does fall within Part 120 for its covered functions. Because the analysis turns on the specific certificates held and the functions performed, an operator should confirm its status with its Flight Standards District Office rather than assume.

For a pure Part 61 or Part 141 flight school, the practical takeaway is usually relief: training alone does not pull the school into the Part 120 program. But the moment a school adds a Part 135 charter arm, contracts pilots or mechanics to a certificate holder, or operates a combined training-and-charter business, the program obligations attach — and they are not optional. An operator that should be testing but is not exposes itself to enforcement and to civil penalty, and a covered employee who performs a safety-sensitive function without the required program coverage is a compliance gap that surfaces quickly in an audit.

For operators that are covered, the administrative burden is real and continuous. Random selections must be genuinely random and documented, the annual rates must be met across the calendar year, supervisors must hold current reasonable-suspicion training, and pre-employment results must be verified negative before a new hire touches a safety-sensitive task. Maintenance vendors and contract instructors have to be captured in the testing pool, and records must be retained and producible on request. This is a recurring, calendar-driven program where a missed selection cycle or an untrained supervisor is a finding, so the operators who stay clean are the ones who treat it as a tracked, auditable process rather than a once-a-year scramble.

For combined training and charter operators, Aviatize's Compliance & Auditing module gives the program a place to live: the roster of personnel performing safety-sensitive functions, the pre-employment test status that gates a new instructor or mechanic before their first duty, supervisor reasonable-suspicion training currency, and the retained test records tied to each person's file. Because the same personnel records drive Aviatize's Training Management and Maintenance Execution modules, the people who need to be in the testing pool are already identified by the roles the system assigns them.

Aviatize's KPI Reporting & Dashboards module surfaces the calendar-driven parts of the program — upcoming and overdue selection cycles, and progress against the annual random rate — so nothing slips between quarters, and the Digital Data & Records module keeps the underlying documentation available and audit-ready. Aviatize does not perform testing or replace a third-party administrator; it provides the tracking, alerting, and record retention that keep a covered operator's program organized and defensible.