Yesterday afternoon I began the disassembly of Supply Fan 5 to investigate a very noisy bearing. I informed the control room that I was going to increase the flow on SF-6 from 
~6200 CFM to ~ 8500 CFM to compensate for the reduced air flow of one fan being down. I will continue with disassembly today and if all parts are readily available, I hope to have the fan back up and running by the end of this week.