Diamond DA20 — Service Manual

This document serves as a maintenance manual for the W69EK7 series wood propeller specifically designed for the Diamond DA20-C1 aircraft. It provides detailed instructions on installation, operation, and maintenance procedures to ensure the propeller operates efficiently and safely. The manual emphasizes the importance of proper installation techniques, torque specifications, and regular maintenance checks to maintain airworthiness. It is intended for use by qualified personnel who hold the appropriate FAA licenses for aircraft maintenance and propeller installation.

• The recommended bolt torque for self-locking nuts is between 370 in-lbs (31 ft-lbs) and 380 in-lbs (32 ft-lbs).
• After the first flight, recheck the propeller bolt torque and every 50 hours thereafter.
• The propeller should be installed with MS21044N7 self-locking nuts or AN310-7 castellated nuts with cotter pins.
• Check the tip track of the propeller; it should be within 1/8 inch.
• Inspect the propeller hub for cracks and elongation of bolt holes regularly.