A gas turbine engine (10) includes a spool, a gearbox (54) having gearing driven by the spool, and a lubrication system (12). The lubrication system includes a first heat exchanger (32) positioned in a first air flow path (40), a second heat exchanger (34) positioned in a second air flow path (42), and a lubrication pump (48) fluidically connected to both the first heat exchanger and the second heat exchanger. A first air fan (36) is driven by the gearbox for inducing air flow through the first air flow path. A second air fan (38) is driven by an electric motor for inducing air flow through the second air flow path.