1. 8506. (1) Propellers are NOT included in the Airworthi ness Directive system. (2) A certificated powerplant mechanic may make a minor repair on an aluminum propeller and approve for return to service. Regarding the above statements, A. only No. 2 is true. B. both No. 1 and No. 2 are true C. neither No. 1 nor No. 2 is true