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.