ACC Users Group › ACC Users Group Discussion Forums › Fans & Gearboxes › ACC Fan U-bolts › Reply To: ACC Fan U-bolts January 31, 2018 at 3:48 pm #1853 fbadiaParticipant How long have these fans been in service? How often do you have to re-torque the U-bolts? We’ve never had this issue, but we do an annual PM to check blade pitch, tracking and bolt torque.
