20 HARTZELL PROPELLER INC. / Rockwell / SUBJECT SEE HARTZELL PROPELLER INC. / In Hartzell Propeller Inc. / Service Bulletin / Fuji / Information A. Effectivity (1) Hartzell Propeller Inc. / Aerostar Aircraft Corporation / HARTZELL PROPELLER INC. / non-Hartzell Propeller Inc. / /