 However , in late 1965 , just over a year before the accident , Phillips had headed a " tiger team " investigating the causes of inadequate quality , schedule delays , and cost overruns in both the Apollo CSM and the Saturn V second stage ( for which North American was also prime contractor ) . He gave an oral presentation ( with transparencies ) of his team 's findings to Mueller and Seamans , and also presented them in a memo to North American president John L. Atwood , to which Mueller appended his own strongly worded memo to Atwood . 
