17. For the purposes of article 12(5), the following repairs or replacements are hereby specified:—
(1) Replacement of landing gear tyres, landing skids or skid shoes;
(2) Replacement of elastic shock absorber cord units on landing gear where special tools are not required;
(3) Replacement of defective safety wiring or split pins excluding those in engine, transmission, flight control and rotor systems;
(4) Patch-repairs to fabric not requiring rib stitching or the removal of structural parts or control surfaces, if the repairs do not cover up structural damage and do not include repairs to rotor blades;
(5) Repairs to upholstery and decorative furnishing of the cabin or cockpit interior when repair does not require dismantling of any structure or operating system or interfere with an operating system or affect the structure of the aircraft;
(6) Repairs, not requiring welding, to fairings, non-structural cover plates and cowlings;
(7) Replacement of side windows where that work does not interfere with the structure or with any operating system;
(8) Replacement of safety belts or safety harness;
(9) Replacement of seats or seat parts not involving dismantling of any structure or of any operating system;
(10) Replacement of bulbs, reflectors, glasses, lenses or lights;
(11) Replacement of any cowling not requiring removal of the propeller, rotors, or disconnection of engine or flight controls;
(12) Replacement of unserviceable sparking plugs;
(13) Replacement of batteries;
(14) Replacement of wings and tail surfaces and controls, the attachments of which are designed to provide for assembly immediately before each flight and dismantling after each flight;
(15) Replacement of main rotor blades that are designed for removal where special tools are not required;
(16) Replacement of generator and fan belts designed for removal where special tools are not required;
(17) Replacement of VHF communication equipment, being equipment which is not combined with navigation equipment.