Piper Service Letter No. 349
Applicability: Piper PA-18, PA-22 and PA-25 series aircraft equipped with Lycoming engines
Issue Date: December 14, 1960
Subject: Adjustment of Engine Support Bushings
Summary: Per Lycoming Division of Avco Corporation, it is permissible to use a torque value of 40 inch pounds to provide adequate tightness to maintain proper engine support in lieu of the linear dimension as previously specified.
Open PDF: PIP_SL349.pdf