When the facility income script ran, I incurred a loss from several facilities due to power issues. In 6 of my cities, the power to certain or all facilities mysteriously turned off. They have been powered in some cases for years with no problems before.
In a 7th city, my inventory says that they are powered yet the facility income script showed a loss and said it was due to power issues.
That city was id 25185, the facilities affected were Orce Tavern (ID: 583191), Orce Semi-detached (ID: 583644), Orce Semi-detached (ID: 583645), Orce Tavern (ID: 583200), Orce Garage (ID: 583190)
I had the same problem with suddenly losing power on one of my facilities.
Its been powered and proving income for the previous 4 months without any problems but now its suddenly unpowered. id is 490617