Here's what I found for the AC Finals TV scehds:

America's Cup Finals
September 7 - Races 1+2 - NBC - 4:00pm ET
September 8 - Races 3+4 - NBC - 4:00pm ET
September 10 - Races 5+6 – NBC Sports Network - 3:30pm ET
September 12 - Races 7+8 – NBC Sports Network - 3:30pm ET
September 14 - Races 9+10 - NBC Sports Network - 3:30pm ET
September 15 - Races 11+12 - NBC Sports Network - 3:30pm ET (if necessary)
September 17 - Races 13+14 - NBC Sports Network - 3:30pm ET (if necessary)
September 19 - Races 15+16 - NBC Sports Network- 3:30pm ET (if necessary)
September 21 - Races 17 - NBC Sports Network - 3:30pm ET (if necessary)