Aircraft landing and take-off noise is subject to stringent legislation. Landing gear generates a large proportion of landing noise, so minimising landing gear noise is of significant industrial interest. Unfortunately, traditional aero-acoustic simulation methods based on high quality scale resolving simulations are expensive and time-consuming, limiting their application within the design loop. In this paper, two aero-acoustic simulation methodologies which are cheaper to run than conventional scale resolving simulations are applied to the PDCC-NLG landing gear acoustic test case.