Hartzell Propeller has ended its production of two designs of its propeller, blades and hubs. This cessation will affect tens of thousands of older-design Beech, Cessna, Piper and Twin Commander aircraft. Production has ceased of other related parts for the series-1 and series-8 designs. A number of so-called X- and V-shank propellers suffered corrosion and were subjected to a restrictive Federal Aviation Authority airworthiness directive in 1997.
Source: Flight International