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  4. Part 91
  5. § 91.103
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14 CFR · Part 91

14 CFR § 91.103

Preflight action.

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Read in Subpart B
Part 91 Contents
  • Special Federal Aviation Regulation No. 50-2: Special Flight Rules in the Vicinity of the Grand Canyon National Park, AZ
  • Special Federal Aviation Regulation No. 60: Air Traffic Control System Emergency Operation
  • Special Federal Aviation Regulation No. 97: Special Operating Rules for the Conduct of Instrument Flight Rules (IFR) Area Navigation (RNAV) Operations using Global Positioning Systems (GPS) in Alaska
  • Special Federal Aviation Regulation No. 104: Prohibition Against Certain Flights by Syrian Air Carriers to the United States
  • Subpart A: General
  • Subpart B: Flight Rules
  • Subpart C: Equipment, Instrument, and Certificate Requirements
  • Subpart D: Special Flight Operations
  • Subpart E: Maintenance, Preventive Maintenance, and Alterations
  • Subpart F: Large and Turbine-Powered Multiengine Airplanes and Fractional Ownership Program Aircraft
  • Subpart G: Additional Equipment and Operating Requirements for Large and Transport Category Aircraft
  • Subpart H: Foreign Aircraft Operations and Operations of U.S.-Registered Civil Aircraft Outside of the United States; and Rules Governing Persons on Board Such Aircraft
  • Subpart I: Operating Noise Limits
  • Subpart J: Waivers
  • Subpart K: Fractional Ownership Operations
  • Subpart L: Continued Airworthiness and Safety Improvements
  • Subpart M: Special Federal Aviation Regulations
  • Subpart N: Mitsubishi MU-2B Series Special Training, Experience, and Operating Requirements
  • Appendix A to Part 91: Category II Operations: Manual, Instruments, Equipment, and Maintenance
  • Appendix D to Part 91: Airports/Locations: Special Operating Restrictions
  • Appendix E to Part 91: Airplane Flight Recorder Specifications
  • Appendix F to Part 91: Helicopter Flight Recorder Specifications
  • Appendix G to Part 91: Operations in Reduced Vertical Separation Minimum (RVSM) Airspace

In Brief

What It Is

The requirement to become familiar with all available information before a flight — weather, fuel, alternatives, runway lengths, and takeoff/landing distances.

Why It Matters

It is the regulatory basis for proper preflight planning and a classic checkride question: what exactly does "all available information" include?

FlightPush summary.

Each pilot in command shall, before beginning a flight, become familiar with all available information concerning that flight. This information must include—

(a)

For a flight under IFR or a flight not in the vicinity of an airport, weather reports and forecasts, fuel requirements, alternatives available if the planned flight cannot be completed, and any known traffic delays of which the pilot in command has been advised by ATC;

(b)

For any flight, runway lengths at airports of intended use, and the following takeoff and landing distance information:

(1)

For civil aircraft for which an approved Airplane or Rotorcraft Flight Manual containing takeoff and landing distance data is required, the takeoff and landing distance data contained therein; and

(2)

For civil aircraft other than those specified in paragraph (b)(1) of this section, other reliable information appropriate to the aircraft, relating to aircraft performance under expected values of airport elevation and runway slope, aircraft gross weight, and wind and temperature.

Referenced By

Interpretations of This Section (6)

  • Lyons (BostonAir), 2011
  • Sharp (Banner Tow USA), 2010
  • Doremire, 2010
  • Negron, 2009
  • Bell (AOPA), 2009
  • Gallagher, 2005

Advisory Circulars (12)

  • AC 00-63B
  • AC 107-2A
  • AC 61-134
  • AC 61-140A
  • AC 61-98E
  • AC 90-109A
  • AC 90-114C
  • AC 90-48E
  • AC 90-66C
  • AC 91-78A
  • AC 91-79B
  • AC 91-92

Information for Operators (InFO) (1)

  • InFO 20002

Documents that cite this section, found in their catalog metadata or text. Listed by date, not by significance.

Reflects the eCFR edition current as of July 6, 2026. Retrieved from ecfr.gov on July 17, 2026.

Primary Source

  • Official Source (14 CFR · Part 91)