FAR 91.319 — Experimental Aircraft Limitations
FAR 91.319 explains operating limitations for experimental aircraft: VFR day only, no compensation or hire, populated area restrictions, and passenger notification.
In Plain English
FAR 91.319 sets the rules you must follow when flying an aircraft with an experimental airworthiness certificate. The core idea: experimental aircraft haven't met the same certification standards as standard category aircraft, so the FAA limits how, where, and why you can fly them.
Key limitations:
- Purpose only: You may only operate the aircraft for the purpose its certificate was issued for (e.g., R&D, exhibition, amateur-built operation).
- No compensation or hire in operations that would require a Part 119 certificate, fractional management specs, or operations under Parts 129, 133, or 137.
- Test area: You can't leave the FAA-assigned flight test area until the aircraft is shown to be controllable throughout its normal speed range and maneuvers, with no hazardous characteristics.
- Avoid densely populated areas and congested airways unless specifically authorized.
- When operating, you must:
- Advise each person on board of the experimental nature of the aircraft;
- Operate VFR, day only unless otherwise authorized;
- Notify ATC of the experimental status when using ATC services.
- Special rules apply to light-sport experimentals, glider towing, and 100-hour inspections.
These limits matter because flying outside them is a regulatory violation and a real safety issue — experimental aircraft may behave unpredictably.
Regulation Text
14 CFR § 91.319§ 91.319 Aircraft having experimental certificates: Operating limitations.
(a) Except as provided in § 91.326, no person may operate an aircraft that has an experimental certificate—
(1) For other than the purpose for which the certificate was issued; or
(2) Carrying persons or property for compensation or hire in operations that:
(i) Require an air carrier or commercial operator certificate issued under part 119 of this chapter;
(ii) Are listed in § 119.1(e) of this chapter;
(iii) Require management specifications for a fractional ownership program issued in accordance with subpart K of this part; or
(iv) Are conducted under part 129, 133, or 137 of this chapter.
(b) No person may operate an aircraft that has an experimental certificate outside of an area assigned by the Administrator until it is shown that—
(1) The aircraft is controllable throughout its normal range of speeds and throughout all the maneuvers to be executed; and
(2) The aircraft has no hazardous operating characteristics or design features.
(c) Unless otherwise authorized by the Administrator in special operating limitations, no person may operate an aircraft that has an experimental certificate over a densely populated area or in a congested airway. The Administrator may issue special operating limitations for particular aircraft to permit takeoffs and landings to be conducted over a densely populated area or in a congested airway, in accordance with terms and conditions specified in the authorization in the interest of safety in air commerce.
(d) Each person operating an aircraft that has an experimental certificate shall—
(1) Advise each person carried of the experimental nature of the aircraft;
(2) Operate under VFR, day only, unless otherwise specifically authorized by the Administrator; and
(3) Notify air traffic control of the experimental nature of the aircraft when utilizing air traffic services.
(e) No person may operate a light-sport aircraft that is issued an experimental certificate under § 21.191 of this chapter for compensation or hire, except:
(1) A person may operate an aircraft issued an experimental certificate under § 21.191(i)(1) of this chapter to tow a glider that is a light-sport aircraft or unpowered ultralight vehicle in accordance with § 91.309; or
(2) A person may operate a light-sport aircraft issued an experimental certificate under § 21.191 of this chapter to conduct operations authorized under § 91.326.
(f) No person may lease a light-sport aircraft that is issued an experimental certificate under § 21.191 of this chapter, except—
(1) In accordance with paragraph (e)(1) of this section; or
(2) To conduct a solo flight in accordance with a training program included as part of the deviation authority specified under § 91.326(b).
(g) No person may operate an aircraft issued an experimental airworthiness certificate under § 21.191(i)(1) of this chapter to tow a glider that is a light-sport category aircraft or unpowered ultralight vehicle for compensation or hire or to conduct flight training for compensation or hire in an aircraft which that person provides unless within the preceding 100 hours of time in service the aircraft has—
(1) Been inspected by a certificated repairman (light-sport) with a maintenance rating, an appropriately rated mechanic, or an appropriately rated repair station in accordance with inspection procedures developed by the aircraft manufacturer or a person acceptable to the FAA; or
(2) Received an inspection for the issuance of an airworthiness certificate in accordance with part 21 of this chapter.
(h) [Reserved]
(i) The Administrator may prescribe additional limitations that the Administrator considers necessary, including limitations on the persons that may be carried in the aircraft.
(j) No person may operate an aircraft that has an experimental certificate under § 61.113(i) of this chapter unless the aircraft is carrying not more than 7 occupants.
[Docket 18334, 54 FR 34308, Aug. 18, 1989, as amended by Amdt. 91-282, 69 FR 44881, July 27, 2004; Docket FAA-2016-9157, Amdt. 91-347, 82 FR 3167, Jan. 11, 2017; Docket FAA-2024-2580, Amdt. 91-380, 89 FR 90578, Nov. 18, 2024; Docket FAA-2023-1351, Amdt. 91-378, 89 FR 80340, Oct. 2, 2024; Docket FAA-2023-1377, Amdt. 91-381, 90 FR 35220, July 24, 2025]
(Approved by the Office of Management and Budget under control number 2120-0005)
Link to an amendment published at 90 FR 35220, July 24, 2025.
Oral Exam Questions a DPE Might Ask
Q1What operating limitations apply to an aircraft with an experimental airworthiness certificate?
Per FAR 91.319, you must operate only for the purpose the certificate was issued, fly VFR day only unless otherwise authorized, avoid densely populated areas and congested airways, advise passengers of the experimental nature, and notify ATC when using ATC services.
Q2Can you carry passengers for compensation or hire in an experimental aircraft?
Generally no. FAR 91.319(a)(2) prohibits carrying persons or property for compensation or hire in operations requiring a Part 119 air carrier or commercial operator certificate, fractional management specs, or operations under Parts 129, 133, or 137.
Q3What must be shown before an experimental aircraft can leave its FAA-assigned flight test area?
Under FAR 91.319(b), it must be shown that the aircraft is controllable throughout its normal range of speeds and all maneuvers to be executed, and that it has no hazardous operating characteristics or design features.
Studying for a checkride?
Related Sections in Part 91