DEICE - What normally runs the Blade De-icing equipment? Does it work degraded?
Two Power De-icing Units (PDU) run the de-ice. When one PDU fails the other PDU will start alternating MR blades sets in turn 1+3 then 2+4 and lower the power. TR Blades alternate sets normally so there is no change for TR. FM Book 1. p1-12-17