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[i]The lunar-surface-sensing-probe switches are subject to inadvertent activation and latching during vehicle checkout at the launch site. For this reason, a final visual check of these switches is performed approximately 18 hours before launch, just before closeout of the SLA. This is the final vehicle check performed before the work platforms are removed from around the LM. Functional checks of the struts are not practical after installation of the honeycomb cartridges; however, such checks are performed during landing-gear assembly.[/i]
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