sewage flowed throughout that vessel. passenger greg starks says this time when the crew was doing maintenance checks -- >> during that time the tie loets and everything started overflowing down to the main general lobby area where people were frequenting the bathroom." >> reporter: in an e-mail to cnn, a carnival spokesman said the toilet problems were minimal. only one public restroom was taken offline for cleaning based on toilet overflow. and there was a total of one request for cleaning up a guest cabin bathroom. i said toilet service was fully restored after midnight thursday morning. but passenger chris anderson said this. >> they were out of service for quite some time, for several hours. ours started working about 8:00 this morning. >> reporter: a carnival official said they'll look into that. just one day before the dream's generator malfunctioned, a top carnival official announced the company was conducting a comprehensive review of the entire fleet, maintenance,