Piper PA-12 Super Cruiser — Service Bulletins

This document is a Vendor Service Publication No. 62, issued on April 7, 1986, addressing the AVCO Lycoming Service Bulletin No. 464A. It is directed towards all owners and operators of Piper aircraft, including distributors and service facilities. The bulletin highlights a potential failure of impulse couplings in various Piper models, including the PA-12 Super Cruiser, which could lead to a total loss of engine power. The document outlines compliance requirements for inspection and identification of affected magnetos and provides detailed instructions for ensuring safety and compliance with the service bulletin.

• The service bulletin applies to the Piper PA-12 Super Cruiser and other models listed.
• Impulse coupling failures can lead to total engine power loss.
• Magnetos with less than 300 operating hours must be inspected before the next engine start.
• All affected impulse coupling assemblies must be inspected and identified as compliant with the service bulletin.
• Improperly heat-treated flyweights must be replaced immediately to ensure safety.