A fairing (118) comprises an inner platform (122), an outer platform (120), a plurality of vane bodies (124), and a flange (126). The inner and outer rings define radially inner and outer boundaries of an airflow path. The vane bodies extend radially from the inner platform to the outer platform. The flange extends radially outward from the outer platform, and is defined by a frustoconical surface (S) extending radially inward and axially aft from a substantially radial upstream surface.