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FUSELAGE DOORS BOILERS SHELL RCS MODULE PAYLOAD EVA I AIRLOCK WITH TUNNEL ADAPTER DOCKING AIRLOCK 2 TUNNEL ADAPTER DOCKING AIRLOCK 2 TUNNEL ADAPTER SPACELAB DOCKING MODULE MOUNTED ON TUNNEL ADAPTER SPACELAB DOCKING MODULE MOUNTED ON PAN/TILT MECHANISM ON FORWARD AND AFT BULKHEADS TELEVISION CAMERA MOUNTED ON TUNNEL ADAPTER Figure 3-9.— Airlock/tunnel adapter/docking module Configurations. MID FUSELAGE CREW CABIN 71.5.