Piper PA-31T Cheyenne II — Supplemental Type Certificate

This document is an interim final rule issued by the Federal Aviation Administration (FAA) concerning aging airplane safety. It mandates inspections and records reviews for multiengine airplanes, including the Piper PA-31T Cheyenne II, after they reach 14 years in service. The rule aims to ensure the airworthiness of aging aircraft and requires operators to demonstrate that maintenance of age-sensitive parts has been adequate. The document outlines the regulatory framework, the rationale behind the rule, and the specific requirements that operators must follow to maintain compliance. It is intended for operators and maintenance personnel involved with aging aircraft, providing them with essential guidelines to ensure safety and compliance with federal regulations.

• Inspections required for multiengine airplanes after 14 years in service.
• Operators must demonstrate adequate maintenance of age-sensitive parts.
• Service-history-based inspections allowed for airplanes with nine or fewer passenger seats.
• Repeat inspection interval extended from 5 years to 7 years.
• Exemptions apply for operations within Alaska.