MIL-STD-1530C(USAF)
5.5.3 Loads/Environment Spectra Survey (L/ESS).
The loads/environment spectra survey shall be conducted to obtain actual usage data that can be used to update the original design spectrum. A new baseline operational loads spectrum shall be developed from the in-flight measurements and the predicted operational environment updated as necessary. Significant changes to the baseline operational loads spectrum shall be used to update the analyses described in 5.5.5. Data systems should comply with the requirements of AFPD 63-14 and AFI 63-1401.
5.5.3.1 Initial Loads/Environment Spectra Survey.
The initial survey period shall last for at least 3 years after Initial Operating Capability (IOC). The length of the initial survey period shall be based on evaluations of the mission types, mission mix, and quantity of aircraft in service.
5.5.3.2 Loads/Environment Spectra Survey updates.
The stability of mission types, mixes, and severity shall be evaluated to determine the need for periodic survey updates. The ASIP Manager shall review the need for L/ESS updates annually.
5.5.4 ASIP Manual.
An Aircraft Structural Integrity Program Technical Order (T.O. X-YY-38) is required for each aircraft per MIL-DTL-87929; Appendix G of the specification provides format and content for an Aircraft Structural Integrity Program Technical Manual. The intent of a T.O. X-YY-38 is to provide the flight-line maintainer basic information on the ASIP and to define actions (if any) that maintainers must perform to support the ASIP. Periodic updates of this technical order are required as the ASIP changes.
5.5.5 Aircraft structural records.
Records which pertain to aircraft structures shall be retained to provide a historical basis for evaluation of continued airworthiness.
5.5.5.1 Structural maintenance records.
The structural maintenance database shall be used to capture detailed information on the aging processes occurring in the aircraft and support the ongoing evaluation of structural integrity during sustainment. The database shall record all significant damage findings such as cracks, corrosion, and/or delaminations discovered during PDM, analytical condition inspections, TCTO structural inspections, teardown inspections, and normal operational maintenance. The database shall also record a description of the damage types, damage sizes, damage locations, inspection techniques (including POD information), aircraft configuration, pertinent aircraft usage history including basing information, and corrosion preventative methods (e.g., wash cycles, coatings, etc.). The database shall also record all significant repairs and/or modifications so as to maintain configuration control. These records shall include a description of the repair/modification and when it was incorporated.
5.5.5.2 Weight and balance records.
Weight and balance records shall be maintained to ensure the aircraft remains within its approved limitations. Guidance may be found in SAWE RP No. 7 and T.O. 1-1B-50.
5.5.6 Force management updates.
Mission and usage changes, major modifications, as well as aircraft inspection findings shall be evaluated by analysis and/or testing (to include a possible additional full-scale static and/or durability test) to determine the need for and timing of periodic updates to the force management strategy. It is envisioned that updates will be required every 5 years or as dictated by the requirements defined in the subparagraphs below. Information which results from the updates described below shall be documented in the FSMP.
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