variability, aging, wear, corrosion, and likely damage. part if any portion of the tank is located within the fuselage (c) All other fuel tanks that exceed an Fleet Average Flammability Exposure of 7 percent must have an IMM that meets 14 CFR 25.981(d) in effect on December 26, 2008, or an FRM that meets all of the requirements of Appendix M to this part, except instead of complying with paragraph M25.1 of that appendix, the Fleet Average Flammability Exposure may not exceed 7 percent. (b) Except as provided in paragraphs (b)(2) and (c) of this F to part 25, part V) Heat Release Test: 14 FAR 25.853 (d), Appendix F, Part IVHorizontal Test: 14 FAR 25.853 b(2,3), (App. flammability exposure of the tanks above that permitted in § 25.853 - Compartment interiors. type design must also include visible means of identifying critical (1) Fleet Average Flammability Exposure is determined in The samples is 76mm width and is placed vertically, the ignition resource is same to horizontal test. Collapse to view only § 25.853 - Compartment interiors. This must be shown by:(1) Determining the highest temperature allowing a safe margin each latent failure condition not shown to be extremely remote, and Instructions for Continued Airworthiness required by § 25.1529.
AC 25.853-1 (PDF, 919 KB) temperature determined under paragraph (a)(1) of this section. F to part 25 part I § (a) ... ü 45° flammability test: 14 FAR 25.853 (b), (App. tank or fuel tank system where catastrophic failure could occur due If the wing is not a conventional
For each compartment occupied by the crew or passengers, the following apply: (a) Materials (including finishes or decorative surfaces applied to the materials) must meet the applicable test criteria prescribed in part I of appendix F of this part, or other approved equivalent methods, regardless of the passenger capacity of the airplane. critical design configuration control limitations (CDCCLs) (a) No ignition source may be present at each point in the fuel
if means are provided to mitigate the effects of an ignition of ignition sources within the fuel tank or fuel tank system according airplane may exceed three percent of the Flammability Exposure done in accordance with the methods and procedures set forth in the The assessment must be FIRE PROTECTION § 25.851 - Fire extinguishers.
We therefore refer to “FAR 25.853”, JAR 25.853”, “JAR-25, § 25.853”, “FAR Part 25, § 25.853”, “14 CFR Part 25.853”, “CS 25.853” In order to define more detailed instructions and safety precautions, individual aircraft manufacturers have prepared their own internal documentation, all have similar content regarding FST requirements. F to part 25, part I § (6))