Guidance information is provided for showing compliance with structural and functional safety standards for doors and their operating systems.

This advisory circular (AC) provides guidance for demonstrating compliance with the airworthiness standards that specify the requirements for material strength properties and material design values. This guidance is applicable to transport category airplanes for which a new, amended, or supplemental type certificate is requested.

This advisory circular (AC) provides guidanc~ for compliance with the provisions of Title 14, Code of Federal Regulations (14 CFR) part 25, pertaining to the requirements for damage-tolerance and fatigue evaluation oftransport category aircraft structurce, including evaluation of widespread fatigue dam, age (VlFD) and establishing a limit of validity of the engineering data that supports the structural-maintenance program (hereafter referred to as the LOV).

The procedures set forth by this AC are applicable to the large transport category airplanes operated under Subpart D of part 91, and parts 121 and 125.

This advisory circular (AC) describes acceptable means for showing compliance with the requirements of Title 14, Code of Federal Regulations (14 CFR) 25.341, Gust and turbulence loads. Section 25.341 specifies the discrete gust and continuous turbulence dynamic load conditions that apply to the airplane and engines.

Section 25.415 specifies the gust load conditions that are assumed to occur while the airplane is taxiing, and when parked. These load conditions apply to the flight control systems and surfaces.

Section 25.963(d) references §§ 25.561 and 25.721, which also address emergency landing conditions.

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scale emergency evacuation demonstrations, and (2) use of analysis and tests in lieu of conducting an actual demonstration.

Guidance applies to airplanes required to conform with 25.856, and part VI of appendix F to Title 14 Code of Federal Regulations (14 CFR) part 25.

This guidance applies to airplanes required to comply with § 25.856 and part VII of Appendix F to 14 CFR part 25.

Section 25.621 outlines the factors, tests, and inspections that must be applied to castings used in structural applications.

Section 25.362 specifies the engine failure dynamic load conditions that apply to the engine mounts, pylons, and adjacent supporting airframe structure.

Section 25.307 requires structural testing to demonstrate compliance with the strength and deformation requirements of subpart C, unless structural analysis has been shown to be reliable.