Piper J-3 Cub — Supplemental Type Certificate

This document is a Supplemental Type Certificate (STC) issued by the FAA for modifications to the Piper J-3 series aircraft. It certifies that the installation of specific Teledyne Continental engines and propellers meets the airworthiness requirements. The STC outlines the limitations and conditions for the modifications, including the requirement to carry a specific Supplemental Airplane Flight Manual during all flights. The document is intended for aircraft owners and maintenance personnel involved in the modification and operation of the Piper J-3 series aircraft. It provides detailed specifications for eligible aircraft models, engine limits, propeller specifications, and maintenance instructions necessary for compliance with the STC.

• Maximum gross weight for landplane: 1220 lbs.
• Engine options include A-65 (65 hp) and C-90 (90 hp).
• Propeller RPM limits for landplane: 2050-2250 RPM.
• Supplemental Airplane Flight Manual must be on board during flights.
• Eligibility includes multiple Piper J-3 series models.