- (1) [FSR 1] NASA programs and projects that do not meet the provisions of this NASA Technical Standard shall be assessed by the NASA Program Manager for the associated risk to the success of the planned NASA mission and approved by the delegated Technical Authority.
- (2) [FSR 2] This NASA Technical Standard shall not supersede applicable laws and regulations unless a specific exemption has been obtained by the Office of the NASA Chief Engineer.
b. Constraints and Preconditions
- (1) [FSR 3] The service environments and limit loads shall be well defined.
- (2) [FSR 4] Aerospace standard manufacturing and process controls shall be used in hardware fabrication and handling.
- (3) [FSR 5] Deviations of the test article from the flight configuration shall be documented and approved by the delegated Technical Authority.
The criteria of this NASA Technical Standard were developed in the context of structural and mechanical systems designs that are amenable to engineering analyses by current state-of-the-art methods and are in conformance with standard aerospace industry practices. More specifically, the designs are assumed to use materials having mechanical properties that are well characterized for the intended service environments and all design conditions. For reusable and multi-mission hardware, these criteria are applicable throughout the design service life and all the missions.
Test hardware should, as far as is practical, be representative of the flight configuration.
4.6
Alternate Approaches
4.6.1
[FSR 57] In the event a particular factor of safety requirement of this NASA Technical Standard cannot be met for a specific spaceflight structure or hardware component, an alternative or modified approach shall be proposed to verify the strength adequacy of the design.
4.6.2
[FSR 58] A written risk assessment that justifies the use of the alternate approach shall be prepared by the organization with primary responsibility for the development of the structure or component.
4.6.3
[FSR 59] The risk assessment shall be submitted to the delegated Technical Authority for approval prior to the implementation of the alternative approach.
4.6.4
[FSR 60] If the lower factors of safety are approved by the delegated Technical Authority, a waiver shall be written that documents the rationale for this one-time exception.
NASA-STD-5001B W/CHANGE 3
4.6.5
[FSR 61] Waivers shall not be used as precedents for future mission applications.