An assembly comprising: a liner separating a first region from a second region, the liner including at least one liner aperture, a first surface contiguous with the first region, and a second surface contiguous with the second region; and an airflow deflector (62; 462; 562) mounted to the liner, the airflow deflector (62; 462; 562) comprising: at least one liner attachment flange (66; 466; 566; 766), having a liner side surface (170A, 170B; 470A; 570A) and an opposing outer surface (172A, 172B; 472A; 572A); a panel; and at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extending between and attached to the at least one liner attachment flange (66; 466; 566; 766); wherein the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extends a distance between the panel and the liner attachment flange (66; 466; 566; 766) to maintain the panel (68; 768) a separation distance from the liner attachment flange (66; 466; 566; 766), characterised in that the at least one liner attachment flange (66; 466; 566; 766) has an airflow metering orifice (82; 782), and the airflow deflector (62; 462; 562) is configured for insertion of the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) and the panel (68; 768) within a liner aperture, wherein the at least one liner attachment flange (66; 466; 566; 766) and the panel are non-parallel one another. a liner separating a first region from a second region, the liner including at least one liner aperture, a first surface contiguous with the first region, and a second surface contiguous with the second region; and an airflow deflector (62; 462; 562) mounted to the liner, the airflow deflector (62; 462; 562) comprising: at least one liner attachment flange (66; 466; 566; 766), having a liner side surface (170A, 170B; 470A; 570A) and an opposing outer surface (172A, 172B; 472A; 572A); a panel; and at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extending between and attached to the at least one liner attachment flange (66; 466; 566; 766); wherein the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extends a distance between the panel and the liner attachment flange (66; 466; 566; 766) to maintain the panel (68; 768) a separation distance from the liner attachment flange (66; 466; 566; 766), characterised in that the at least one liner attachment flange (66; 466; 566; 766) has an airflow metering orifice (82; 782), and the airflow deflector (62; 462; 562) is configured for insertion of the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) and the panel (68; 768) within a liner aperture, wherein the at least one liner attachment flange (66; 466; 566; 766) and the panel are non-parallel one another. at least one liner attachment flange (66; 466; 566; 766), having a liner side surface (170A, 170B; 470A; 570A) and an opposing outer surface (172A, 172B; 472A; 572A); a panel; and at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extending between and attached to the at least one liner attachment flange (66; 466; 566; 766); wherein the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) extends a distance between the panel and the liner attachment flange (66; 466; 566; 766) to maintain the panel (68; 768) a separation distance from the liner attachment flange (66; 466; 566; 766), characterised in that the at least one liner attachment flange (66; 466; 566; 766) has an airflow metering orifice (82; 782), and the airflow deflector (62; 462; 562) is configured for insertion of the at least one leg (64; 164A, 164B; 464; 564A, 564B, 564C; 764) and the panel (68; 768) within a liner aperture, wherein the at least one liner attachment flange (66; 466; 566; 766) and the panel are non-parallel one another.