Subpart F Applicability

FAR 91.501 Subpart F Applicability

FAR 91.501 explains which large airplanes, turbojet multiengine aircraft, and fractional ownership operations fall under Part 91 Subpart F operating rules.

In Plain English

FAR 91.501 defines who must follow the operating rules in Subpart F of Part 91. It applies to large airplanes of U.S. registry, turbojet-powered multiengine civil airplanes of U.S. registry, and fractional ownership program aircraft operated under Subpart K — but only in operations not involving common carriage. If the flight is required to be conducted under Parts 121, 125, 129, 135, or 137, those rules govern instead.

The section also lists the non-common-carriage operations that may be flown under Subpart F rather than the air-carrier parts, including:

  • Ferry or training flights
  • Aerial work (photography, survey, pipeline patrol — but not firefighting)
  • Demonstration flights to prospective buyers
  • Personal transportation by the owner or guests with no charge
  • Company carriage of officials, employees, and guests incidental to the business
  • Time sharing, interchange, and joint ownership agreements (defined in paragraph (c))
  • Carriage of athletic, sports, or similar groups with no charge

Paragraph (d) lists the limited expenses (fuel, crew travel, landing fees, etc., plus a 100% surcharge on fuel) that may be charged for certain of these flights. This matters operationally because it draws the legal line between private operations under Part 91 and commercial operations that demand an air carrier certificate.

Regulation Text
14 CFR § 91.501
§ 91.501 Applicability. (a) This subpart prescribes operating rules, in addition to those prescribed in other subparts of this part, governing the operation of large airplanes of U.S. registry, turbojet-powered multiengine civil airplanes of U.S. registry, and fractional ownership program aircraft of U.S. registry that are operating under subpart K of this part in operations not involving common carriage. The operating rules in this subpart do not apply to those aircraft when they are required to be operated under parts 121, 125, 129, 135, and 137 of this chapter. (Section 91.409 prescribes an inspection program for large and for turbine-powered (turbojet and turboprop) multiengine airplanes and turbine-powered rotorcraft of U.S. registry when they are operated under this part or part 129 or 137.) (b) Operations that may be conducted under the rules in this subpart instead of those in parts 121, 129, 135, and 137 of this chapter when common carriage is not involved, include— (1) Ferry or training flights; (2) Aerial work operations such as aerial photography or survey, or pipeline patrol, but not including fire fighting operations; (3) Flights for the demonstration of an airplane to prospective customers when no charge is made except for those specified in paragraph (d) of this section; (4) Flights conducted by the operator of an airplane for his personal transportation, or the transportation of his guests when no charge, assessment, or fee is made for the transportation; (5) Carriage of officials, employees, guests, and property of a company on an airplane operated by that company, or the parent or a subsidiary of the company or a subsidiary of the parent, when the carriage is within the scope of, and incidental to, the business of the company (other than transportation by air) and no charge, assessment or fee is made for the carriage in excess of the cost of owning, operating, and maintaining the airplane, except that no charge of any kind may be made for the carriage of a guest of a company, when the carriage is not within the scope of, and incidental to, the business of that company; (6) The carriage of company officials, employees, and guests of the company on an airplane operated under a time sharing, interchange, or joint ownership agreement as defined in paragraph (c) of this section; (7) The carriage of property (other than mail) on an airplane operated by a person in the furtherance of a business or employment (other than transportation by air) when the carriage is within the scope of, and incidental to, that business or employment and no charge, assessment, or fee is made for the carriage other than those specified in paragraph (d) of this section; (8) The carriage on an airplane of an athletic team, sports group, choral group, or similar group having a common purpose or objective when there is no charge, assessment, or fee of any kind made by any person for that carriage; and (9) The carriage of persons on an airplane operated by a person in the furtherance of a business other than transportation by air for the purpose of selling them land, goods, or property, including franchises or distributorships, when the carriage is within the scope of, and incidental to, that business and no charge, assessment, or fee is made for that carriage. (10) Any operation identified in paragraphs (b)(1) through (b)(9) of this section when conducted— (i) By a fractional ownership program manager, or (ii) By a fractional owner in a fractional ownership program aircraft operated under subpart K of this part, except that a flight under a joint ownership arrangement under paragraph (b)(6) of this section may not be conducted. For a flight under an interchange agreement under paragraph (b)(6) of this section, the exchange of equal time for the operation must be properly accounted for as part of the total hours associated with the fractional owner's share of ownership. (c) As used in this section— (1) Ameans an arrangement whereby a person leases his airplane with flight crew to another person, and no charge is made for the flights conducted under that arrangement other than those specified in paragraph (d) of this section; (2) Anmeans an arrangement whereby a person leases his airplane to another person in exchange for equal time, when needed, on the other person's airplane, and no charge, assessment, or fee is made, except that a charge may be made not to exceed the difference between the cost of owning, operating, and maintaining the two airplanes; (3) Ameans an arrangement whereby one of the registered joint owners of an airplane employs and furnishes the flight crew for that airplane and each of the registered joint owners pays a share of the charge specified in the agreement. (d) The following may be charged, as expenses of a specific flight, for transportation as authorized by paragraphs (b) (3) and (7) and (c)(1) of this section: (1) Fuel, oil, lubricants, and other additives. (2) Travel expenses of the crew, including food, lodging, and ground transportation. (3) Hangar and tie-down costs away from the aircraft's base of operation. (4) Insurance obtained for the specific flight. (5) Landing fees, airport taxes, and similar assessments. (6) Customs, foreign permit, and similar fees directly related to the flight. (7) In flight food and beverages. (8) Passenger ground transportation. (9) Flight planning and weather contract services. (10) An additional charge equal to 100 percent of the expenses listed in paragraph (d)(1) of this section. [Docket 18334, 54 FR 34314, Aug. 18, 1989, as amended by Amdt. 91-280, 68 FR 54560, Sept. 17, 2003]
Oral Exam Questions a DPE Might Ask
Q1To what aircraft does Subpart F of Part 91 apply?
Per FAR 91.501, Subpart F applies to large airplanes of U.S. registry, turbojet-powered multiengine civil airplanes of U.S. registry, and fractional ownership program aircraft operated under Subpart K, when not engaged in common carriage.
Q2What is the difference between a time sharing, interchange, and joint ownership agreement?
FAR 91.501(c) defines time sharing as leasing an airplane with crew to another person, interchange as trading equal flight time on each other's airplanes, and joint ownership as registered co-owners sharing costs while one owner provides the crew.
Q3What expenses can be charged on a demonstration flight or time-sharing flight under this rule?
FAR 91.501(d) allows charging for fuel and oil, crew travel, hangar/tie-down away from base, flight-specific insurance, landing fees, customs fees, in-flight food, passenger ground transport, flight planning/weather services, plus an additional 100% of the fuel cost.
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FAR 91.501 — Subpart F Applicability for Large & Turbojet Aircraft