Abstract: An axial flow gas turbine engine has a combustion section with a number of nozzle assemblies for injecting fluent materials, such as fuel, combustion enhancers, or pollutant reducers, into a burner which is supplied with air from the combustion section plenum. The nozzle assemblies are carried by a wall separating the plenum from the outside of the engine and extend from the wall to associated openings in the burner can. The nozzle head and an associated feeder tube is easily removable from the remainder of each nozzle assembly for cleaning, repair or replacement of the nozzle head, or for other purposes. The nozzle assemblies and their supply manifolds are further arranged so that a central liner of the burner can may be removed through the wall without disturbing the nozzle assemblies or the supply manifolds.