Cessna R172 Hawk XP manuals

This Service Bulletin No. 090 addresses issues related to alternator thru-bolts in certain Cessna aircraft models, including the Cessna R172. It provides critical information regarding the alternators shipped by Hartzell Engine Technologies between February 15, 2022, and March 4, 2022. The bulletin outlines the compliance requirements for inspection and replacement of affected alternators to ensure continued airworthiness. It emphasizes the importance of using the most recent revision of the bulletin to avoid unsafe conditions that could lead to serious injury or property damage. The document is intended for aircraft owners and maintenance personnel responsible for ensuring the safety and reliability of the aircraft's electrical system.

• Affected alternators were shipped between February 15, 2022, and March 4, 2022.
• Compliance with the Service Bulletin is required prior to further flight.
• Inspection of the alternator must be performed by qualified personnel.
• Recurring inspections are required every 25 aircraft-hours, not to exceed 100 aircraft-hours from the initial inspection.
• If defects are found, the alternator must be replaced before further flight.