AC 25.975-1

Advisory circular · Fuel Vent Fire Protection

Approved
June 24, 2016
Last reviewed
February 27, 2017
Family
AC 25.975-1 · 1 version
14 CFR parts
25
14 CFR sections
§ 25.975

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed October 23, 2026.

Show pages 7–18
Page 19OCROpen in PDF

Appendix A Figure A-2. Flame Arrestor Surface Temperature at Various Flow Rates and Stoichiometric Mixture Ratios2 500 480 Relative Flow Rate 460

0.550 BOTTOM SURFACE TEMPERATURE (°F) 440 420

• 0.648 400

0.774 380

0.915 360 1 Inch X 0.050 Inch Stainless Steel Arrestor 1.000 340

0.9 1.0 1.1 1.2 1.3 1.4 1.5

FRACTION OF STOICHIOMETRIC 2 FAA Technical Report ADS-18, Lightning Protection Measures for Aircraft Fuel Systems (see paragraph 3.3 of this AC).

A-4

Advisory Circular Feedback If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by (1) emailing this form to 9-AWA-AVS- AIR500-Coord@faa.gov or (2) faxing it to the attention of the Aircraft Certification Service Directives Management Officer at (202) 267-3983.

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