The fan cowls give an aerodynamically smooth surface over the engine, the engine mounted components and the accessories, as well as protecting them. Cooling air from the air intake cowl goes over the components and accessories to cool them. The fan cowls are attached to the pylon and align with the air intake cowl, the pylon fairing, and the thrust reverser doors. The cowls latch together at the engine bottom centerline and have seals at the joint. The front and rear edges of the fan cowls seal on the air intake cowl and the thrust reverser.