Piper PA-24 Comanche 260 — Service Bulletins

This Airworthiness Bulletin addresses the engine alternate air systems for all Piper PA-24-260 Comanche aircraft. It clarifies the requirements for aircraft equipped with Bendix RSA fuel servos, which may have either a manually operated or an automatic spring-loaded alternate air system. The bulletin outlines the background of FAA Airworthiness Directives (ADs) related to these systems and provides recommendations for operators regarding inspections and modifications. It emphasizes the importance of understanding the different configurations of the alternate air systems to prevent confusion and ensure safe operation.

• This bulletin is applicable to all Piper PA-24-260 Series Comanche aircraft.
• Operators should consider replacing the spring-loaded automatic alternate air door with a manually operated system as per Piper SB No.861.
• A visual inspection of the engine installation is recommended during the next periodic inspection to identify the type of fuel delivery system and alternate air arrangement.
• Defects related to the engine alternate air systems must be reported to CASA.
• Contact CASA for any inquiries regarding this bulletin.