Word: subcontractor
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Dates: during 1970-1979
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...back as 1965, the 1,113-page report said, Apollo's prime contractor, North American Rockwell, had ordered that specifications for two small electric switches used to cut off the oxygen tank's internal heater be increased to 65 volts. Inexplicably, the subcontractor for the tanks, Beech Aircraft, kept delivering switches with a top rating of only 28 volts. Despite elaborate checkout procedures that were repeated through six previous Apollo manned missions, neither NASA nor its suppliers ever detected the oversight. Indeed, the error might never have been discovered if it had not been seriously compounded by other...