In a smoke warning system ambient conditions are included in the evaluation of the smoke warning transmitter statuses, or the internal signal evaluation in the smoke warning transmitter is influenced. The fastener shield has a radially-extending, downstream-facing mounting flange with a plurality of circumferentially spaced bolt holes positioned to receive respective engine mounting bolts therethrough and to attach the mounting flange to elements of the turbine engine. In the event of a relative movement between the rotor and the stator, each stator module generates a module-inherent output voltage. The adjustment of the position of the tow rope retention point relative to the plough is done by moving the bridle rope retention points or adjusting the relative length of the bridle limbs. The method of cleaning debris cleans debris by using the rubbing cloth or the roller under illumination condition. The support of the oxidation catalyst comprises a metallic material or a material having a specific heat not higher than that of the metallic material, and has a structure having the function of mixing the exhaust gas.