14 CFR 25.721 - General.

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§ 25.721 General.
(a) The main landing gear system must be designed so that if it fails due to overloads during takeoff and landing (assuming the overloads to act in the upward and aft directions), the failure mode is not likely to cause—
(1) For airplanes that have passenger seating configuration, excluding pilots seats, of nine seats or less, the spillage of enough fuel from any fuel system in the fuselage to constitute a fire hazard; and
(2) For airplanes that have a passenger seating configuration, excluding pilots seats, of 10 seats or more, the spillage of enough fuel from any part of the fuel system to constitute a fire hazard.
(b) Each airplane that has a passenger seating configuration excluding pilots seats, of 10 seats or more must be designed so that with the airplane under control it can be landed on a paved runway with any one or more landing gear legs not extended without sustaining a structural component failure that is likely to cause the spillage of enough fuel to constitute a fire hazard.
(c) Compliance with the provisions of this section may be shown by analysis or tests, or both.
[Amdt. 25-32, 37 FR 3969, Feb. 24, 1972]

Title 14 published on 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 14.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-09-29; vol. 79 # 188 - Monday, September 29, 2014
    1. 79 FR 58243 - Special Conditions: Boeing, Model 767-200/-300 Series Airplane, as Modified by Avionics Support Group; Installed Rechargeable Lithium Batteries and Battery Systems
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Final special conditions; request for comments.
      The effective date of these special conditions is September 29, 2014. We must receive your comments by November 13, 2014.
      14 CFR Part 25

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United States Code

Title 14 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 14 CFR 25 after this date.

  • 2014-09-29; vol. 79 # 188 - Monday, September 29, 2014
    1. 79 FR 58243 - Special Conditions: Boeing, Model 767-200/-300 Series Airplane, as Modified by Avionics Support Group; Installed Rechargeable Lithium Batteries and Battery Systems
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Final special conditions; request for comments.
      The effective date of these special conditions is September 29, 2014. We must receive your comments by November 13, 2014.
      14 CFR Part 25