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Regulations last checked for updates: Jan 07, 2026
Title 14 - Aeronautics and Space last revised: Dec 19, 2026
All Titles
Title 14
Chapter I
Part 21 - PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND ARTICLES
Appendix - Special Federal Aviation Regulation No. 88—Fuel Tank System Fault Tolerance Evaluation Requirements
Subpart A [§ 21.1 - § 21.9] - Subpart A—General
Subpart B [§ 21.11 - § 21.55] - Subpart B—Type Certificates
Subpart C [§ 21.71 - § 21.85] - Subpart C—Provisional Type Certificates
Subpart D [§ 21.91 - § 21.101] - Subpart D—Changes to Type Certificates
Subpart E [§ 21.111 - § 21.120] - Subpart E—Supplemental Type Certificates
Subpart F [§ 21.121 - § 21.130] - Subpart F—Production Under Type Certificate
Subpart G [§ 21.131 - § 21.150] - Subpart G—Production Certificates
Subpart H [§ 21.171 - § 21.199] - Subpart H—Airworthiness Certificates
Subpart I [§ 21.211 - § 21.225] - Subpart I—Provisional Airworthiness Certificates
Subpart J - Subpart J [Reserved]
Subpart K [§ 21.301 - § 21.320] - Subpart K—Parts Manufacturer Approvals
Subpart L [§ 21.321 - § 21.335] - Subpart L—Export Airworthiness Approvals
Subpart M - Subpart M [Reserved]
Subpart N [§ 21.500 - § 21.502] - Subpart N—Acceptance of Aircraft Engines, Propellers, and Articles for Import
Subpart O [§ 21.601 - § 21.621] - Subpart O—Technical Standard Order Approvals
Subpart P [§ 21.700 - § 21.700] - Subpart P—Special Federal Aviation Regulations
authority:
42 U.S.C. 7572
;
49 U.S.C. 106
(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303
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