Inside the PRCB
Tanking Test showdown revealed, NASASpaceflight.com
“The pros and cons of carrying out a Tanking Test ahead of STS-121 have been revealed in a MSFC document. The fascinating document, written by NASA/MSFC’s Robert Champion, was presented to last week’s PRCB (Program Requirements Control Board) – and was responsible for ending any possibility of carrying out the cryo-loading of ET-119, which had been pencilled in for June 1.”