(6) Lubrication not requiring disassembly other than removal of nonstructural items such as cover plates, cowlings, and fairings.
(7) Making simple fabric patches not requiring rib stitching or the removal of structural parts or control surfaces.
(19) Replacing any cowling not requiring removal of the propeller or disconnection of flight controls.(8) Replenishing hydraulic fluid in the hydraulic reservoir.(9) Refinishing decorative coating of fuselage, balloon baskets, wings tail group surfaces (excluding balanced control surfaces), fairings, cowlings, landing gear, cabin, or cockpit interior...FAR 43.7(f) - A person holding at least a private pilot certificate may approve an aircraft for return to service after performing preventive maintenance.