CESSNA 550 Citation II — Service Bulletins

This Service Bulletin (SB7046) addresses the inspection and replacement of the Shuttle Valve Assembly and port for specific brake assemblies used in Cessna aircraft. It applies to all Cessna Model 500, 501, 550, 551, S550, and 552 aircraft equipped with Parker brake assemblies. The bulletin outlines the reasons for the inspection and replacement, including potential issues with the shuttle seal and brake cylinder passageways. Compliance is mandatory for affected parts, with specific instructions provided for both aircraft and spares inventory. The document is FAA DER approved and emphasizes the importance of timely compliance to ensure safety and functionality of the emergency brake system.

• Mandatory inspection and replacement of Shuttle Valve Assembly P/N 111-09800 by June 30, 1996.
• Affected models include Cessna 500, 501, 550, 551, S550, and 552.
• Potential issues with shuttle seals and brake cylinder passageways identified.
• Replacement parts provided at no charge under specific conditions.
• Detailed instructions for replacement and inspection included.