116 of the engine with various components of an augmentor assembly 120 being supported by the vanes by way of example a trailing edge box 122 of vane 114 described in greater detail with respect to fig2 mounts a spray bar assembly for providing a spray of fuel for augmentation and a flame holder assembly for facilitating combustion of the spray of fuel a tailcone 124 also is located in the exhaust section as shown in fig2 augmentor assembly 120 includes a flame holder assembly 130 and a spray bar assembly 132 both of which are mounted to trailing edge box 122 as the names imply the spray bar assembly routes fuel to spray nozzles that provide sprays of fuel for augmentation and the flame holder assembly provides ignition for the sprays of fuel flame holder assembly 130 is shown in greater detail in fig3 as shown in fig3 flame holder assembly 130 includes an impingement sheet assembly 140 that is elongate and which includes a base 141 and a mounting surface 142 mounting surface 142 mounts a series of lugs e g lug 144 that attach the flame holder assembly to the trailing edge box 122 fig2 notably the lugs are shown in respective mounted positions in phantom lines in the embodiment of fig3 two types of lugs are used specifically lugs 144 146 are floating lugs and lug 148 is a fixed lug the floating lugs differ from the fixed lug in this embodiment by incorporating recesses e g recesses 145 147 for receiving fasteners whereas the fixed lug incorporates through holes.