Specifications include, but are not limited to: Item #32 Propulsion Engine, Cummins QSC 8.3 (CID/L 505/8.3 #DR6170RX)) 336300SP20005 Propulsion Engine supports the Plane-mate and Mobile Lounge fleet here at IAD. Engine cores that have failed are supplied to the supplier for rebuilding to factory specifications. The cores are rebuilt to the engine serial number specifications provided from the engine core. The current supplier upfits/groom over parts from the cores to complete the rebuild as some parts are unique to our fleet. Below are some of the up-fits. Random in-service serial numbers of fleet engines have been provided to ensure supplier can understand and meet our specifications. Cummins engine warranty must be provided.