Abstract: An article comprising: a monolithic, single layer, rigid thermoplastic interior component for an aircraft, wherein the thermoplastic interior component has a microcellular foam structure, wherein the thermoplastic interior component has an average two minute heat release of less than or equal to 65 kw-min/m2 when tested in accordance with the requirements of FAR 25.853 (d), Appendix F, Part IV through Amendment 25-116; and wherein the thermoplastic interior component has an average peak heat release of less than or equal to 65 kw/m2 when tested in accordance with the requirements of FAR 25.853 (d), Appendix F, Part IV through Amendment 25-116.