Encyclopedia Astronautica
1967.04.08 - All B-nuts installed in Apollo to be loosened

MSC Structures and Mechanics Division Chief Joseph N.

Kotanchik had strongly recommended that all B-nuts already installed in spacecraft be loosened to relieve any residual strain on nearby solder joints, ASPO Manager George M. Low informed CSM Manager Kenneth S. Kleinknecht. Kotanchik thought the leaks found in spacecraft 012 at KSC and in spacecraft 101 during test were most likely caused by creep. Loosening all joints, replacing them with voishan washers, and then retorquing them with procedures known not to cause strain, should be given serious consideration. Low pointed out this would also accomplish Kleinknecht's desires of being sure that all joints were torqued to proper limits.

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