A gas turbine engine comprising: a duct assembly, the duct assembly comprising: a casing body that extends between a flange and a wall; a first discrete cooling passage formed in said casing body; a second discrete cooling passage formed in said casing body circumferentially spaced from said first discrete cooling passage, wherein at least one of said first discrete cooling passage and said second discrete cooling passage includes an axial portion and a tangential portion configured to turn a cooling fluid communicated in each of said first and second discrete cooling passages radially outward; at least one view port that extends through said wall and providing a line of sight to said flange; a plug removably insertable into said at least one view port; and a case (64,164) that interfaces with said flange at a joint (78,178) between said case (64,164) and said casing body, wherein the joint (78,178) is a male/female connection with the flange defining the female portion of the connection and an end of the case (64,164) defining the male connection; and a first component that is conditioned by said cooling fluid, wherein the gas turbine engine further comprises a second component that is conditioned by a second cooling fluid communicated along an outer surface of said casing body, said second component being different from said first component; and the duct assembly further comprises a retainer received within a slot of said at least one view port for retaining said plug within a bore of said at least one view port. a duct assembly, the duct assembly comprising: a casing body that extends between a flange and a wall; a first discrete cooling passage formed in said casing body; a second discrete cooling passage formed in said casing body circumferentially spaced from said first discrete cooling passage, wherein at least one of said first discrete cooling passage and said second discrete cooling passage includes an axial portion and a tangential portion configured to turn a cooling fluid communicated in each of said first and second discrete cooling passages radially outward; at least one view port that extends through said wall and providing a line of sight to said flange; a plug removably insertable into said at least one view port; and a case (64,164) that interfaces with said flange at a joint (78,178) between said case (64,164) and said casing body, wherein the joint (78,178) is a male/female connection with the flange defining the female portion of the connection and an end of the case (64,164) defining the male connection; and a casing body that extends between a flange and a wall; a first discrete cooling passage formed in said casing body; a second discrete cooling passage formed in said casing body circumferentially spaced from said first discrete cooling passage, wherein at least one of said first discrete cooling passage and said second discrete cooling passage includes an axial portion and a tangential portion configured to turn a cooling fluid communicated in each of said first and second discrete cooling passages radially outward; at least one view port that extends through said wall and providing a line of sight to said flange; a plug removably insertable into said at least one view port; and a case (64,164) that interfaces with said flange at a joint (78,178) between said case (64,164) and said casing body, wherein the joint (78,178) is a male/female connection with the flange defining the female portion of the connection and an end of the case (64,164) defining the male connection; and a first component that is conditioned by said cooling fluid, wherein the gas turbine engine further comprises a second component that is conditioned by a second cooling fluid communicated along an outer surface of said casing body, said second component being different from said first component; and the duct assembly further comprises a retainer received within a slot of said at least one view port for retaining said plug within a bore of said at least one view port.