Beechcraft 23 Musketeer — Service Bulletins

This document is a service bulletin issued by Sensenich Propeller Manufacturing Company, specifically addressing issues related to corrosion in fixed-pitch metal propellers used on Beechcraft Musketeer aircraft. The bulletin outlines the necessary actions for propeller owners, including the removal of mid-blade decals and inspection for corrosion pits and cracks. It is directed towards FAA-approved propeller repair stations, Sensenich distributors, and Beech Musketeer owners. The compliance date for the actions specified in the bulletin is within the next twenty hours of operation, emphasizing the urgency of addressing potential safety issues.

• Propeller models affected include all Sensenich fixed-pitch metal propellers with water-soluble mid-blade decals, including M74DC and M74DM.
• Compliance is required within the next twenty hours of operation.
• Inspection for corrosion pits must be done with a magnifying glass of at least 3 power.
• If corrosion pits deeper than 0.015 inches are found, the propeller must be replaced before further flight.
• Decals must be removed using paint remover; scraping or sanding is prohibited.