SECTION	Title	Time
	Special Federal Aviation Regulation No. 88—Fuel Tank System Fault Tolerance Evaluation Requirements	Apr. 2, 2025 (fm)
§ 21.1	§ 21.1 Applicability and definitions.	Apr. 2, 2025 (fm)
§ 21.2	§ 21.2 Falsification of applications, reports, or records.	Apr. 2, 2025 (fm)
§ 21.3	§ 21.3 Reporting of failures, malfunctions, and defects.	Apr. 2, 2025 (fm)
§ 21.4	§ 21.4 ETOPS reporting requirements.	Apr. 2, 2025 (fm)
§ 21.5	§ 21.5 Airplane or Rotorcraft Flight Manual.	Apr. 2, 2025 (fm)
§ 21.6	§ 21.6 Manufacture of new aircraft, aircraft engines, and propellers.	Apr. 2, 2025 (fm)
§ 21.7	§ 21.7 Continued airworthiness and safety improvements for transport category airplanes.	Apr. 2, 2025 (fm)
§ 21.8	§ 21.8 Approval of articles.	Apr. 2, 2025 (fm)
§ 21.9	§ 21.9 Replacement and modification articles.	Apr. 2, 2025 (fm)
§ 21.11	§ 21.11 Applicability.	Apr. 2, 2025 (fm)
§ 21.13	§ 21.13 Eligibility.	Apr. 2, 2025 (fm)
§ 21.15	§ 21.15 Application for type certificate.	Apr. 2, 2025 (fm)
§ 21.16	§ 21.16 Special conditions.	Apr. 2, 2025 (fm)
§ 21.17	§ 21.17 Designation of applicable regulations.	Apr. 2, 2025 (fm)