Cirrus SR22 — Maintenance Manual

This document is a service bulletin issued by Kelly Aerospace Power Systems regarding mandatory maintenance for certain backup alternators installed in Cirrus Design SR22 aircraft. It specifically addresses the replacement of cooling fan and pulley assemblies on the alternators to prevent potential failures that could lead to loss of alternator function. The bulletin outlines compliance requirements, affected models, and detailed procedures for maintenance personnel. It emphasizes the importance of following the guidelines to ensure safety and proper operation of the aircraft's electrical system.

• Mandatory replacement of cooling fan and pulley assemblies on specific alternators is required to maintain safety.
• Compliance must be completed within 10 hours of service or at the next scheduled maintenance event.
• Affected models include all Cirrus SR22 aircraft with specific Kelly Aerospace backup alternators.
• The replacement procedure must be performed by qualified personnel familiar with aircraft maintenance.
• Warranty coverage applies for labor and parts when performed at authorized service centers.