1. VA-138 and FF-00019 were connected to the engine and a finally torque was given. 2,3. Two pieces of 4 1/2 inches of F AE102-11 were trimmed and glued together with RTV, a layer of COWL SHIELD was glued to the two pieces to create the fire sleeve. 4. The fire sleeve was installed between the expansion tank and the ignition coils as shown in the pictures.