An aircraft (12) includes a servicing opening (26) and multiple service levels (82, 102). The service levels (82, 102) include a noncargo-based service level (82). The service levels (82, 102) are accessible through the service opening (26). An aircraft onboard primary servicing system (66) includes a primary service sub-system (151). An aircraft primary service coupler (154) is configured to attach to a corresponding terminal primary service coupler (152). The aircraft primary service coupler (154) and the terminal primary service coupler (152) providing at least one primary service therethrough.