MIL-STD-1530C(USAF)
5.4 Certification & force management development (Task IV).
Aircraft structural certification is based on the results of Tasks I through III. Certification analyses described in 5.4.1 culminate in structural certification of an aircraft. An ASIP must develop an appropriate force management strategy in preparation for force management that occurs during sustainment under Task V. This strategy depends upon formal documentation of structural capability, creation of maintenance plans, and the development of data acquisition/storage/evaluation systems.
5.4.1 Certification analyses.
The design analyses described in 5.2 shall be revised to account for differences revealed between analysis and test. Selected design development tests described in 5.2, the full-scale tests described in 5.3, and the interpretation and evaluation of test results described in 5.3.7 shall be used in the certification effort. The design analyses correlated to ground and flight testing establish structural certification and are herein referred to as "certification analyses." The certification analyses provide the engineering source data for the Technical Orders that document the operational limitations/restrictions, procedures, and maintenance requirements to ensure safe operation. Approval of the certification analyses shall constitute aircraft structural certification, a critical step in achievement of airworthiness certification for the aircraft in accordance with procedures outlined in MIL-HDBK-516.
5.4.1.1 Risk analysis.
When tailoring, as described in 1.1.2, has been accomplished, a risk analysis shall be performed and utilized in the initial airworthiness certification. The objective of this analysis is to determine the combined impact of all tailored ASIP tasks and/or elements on aircraft structure reliability and to verify that the allocated aircraft structure reliability requirement has been achieved.
5.4.1.2 Quantifying the accuracy of analyses.
The accuracy of the analyses described in 5.2 shall be probabilistically quantified by direct comparison to the test results described in 5.2.14 and 5.3 and documented to support aircraft structural certification.
5.4.2 Strength Summary & Operating Restrictions (SSOR).
A Strength Summary & Operating Restrictions (SSOR) document shall summarize the final analyses and other pertinent structural data into a format which shall provide rapid visibility of the important structural characteristics, limitations, and capabilities in terms of operational parameters. The SSOR shall be primarily in a diagrammatic form that shows the aircraft structural limitations and capabilities as a function of the important operational parameters such as speed, acceleration, center-of-gravity location, and gross weight. The summary shall include brief descriptions of each major structural assembly, in diagrammatic form, which indicate structural arrangements, materials, critical design conditions, damage tolerance and durability critical areas, and minimum margins of safety. Appropriate references to design drawings, detail analyses, test reports, and other back-up documentation shall be provided.
5.4.3 Force Structural Maintenance Plan (FSMP).
The intent during the design of the aircraft is to achieve robust structures that will require little, if any, maintenance for corrosion, fatigue cracking, stress corrosion cracking, and/or delaminations within the design service life assuming that the aircraft is flown to the design loads/environment spectrum. However, full-scale testing described in Task III and the certification analyses performed as part of Task IV may identify critical areas missed during design that would require additional analysis and in- service inspections and perhaps production and/or in-service modifications. The FSMP shall define
when, where, how, and the estimated costs of these inspections and modifications. It shall also describe the recurring structural maintenance program (i.e., periodic, minor and major inspections, program depot maintenance (PDM), the CPCP, etc.) It is intended that the FSMP will be used to establish budgetary
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