Piper Service Letter No. 740
Applicability: All Piper models in which carbureted, 80/87 octane fuel rated Avco Lycoming engines are installed
Issue Date: April 20, 1976
Subject: Aviation Fuel Requirements for Avco Lycoming Engines rated for 80/87 Octane Fuel
Summary: Operational and maintenance procedures used to reduce or maintain lead deposits at a minimum when using higher lead content aviation fuel more than 25% of engine operating time.
Open PDF: PIP_SL740.pdf