Quick view Add to Cart Propellers and Accessories; Installation of Propeller Anti-Icing Equipment, Steel or Aluminum-Alloy Blades Document Part Number: T.O. No. 03-20-23 Number of pages: 4Part Number: T.O. No. 03-20-23 Revision Date: 7-April-1944 MSRP: Was: Now: $15.00