Cessna Citation VII — Service Bulletins

This document is a Service Bulletin for the Cessna Citation VII, specifically addressing the installation of the Digital Electronic Engine Control (N1 DEEC) for the TFE731-4R-2S engine model. It provides detailed instructions and compliance information for operators and maintenance personnel. The bulletin outlines the reasons for the upgrade, including improvements in engine control and monitoring capabilities, and specifies the necessary steps for installation and compliance with associated Supplemental Type Certificates (STCs). It also includes revisions and updates from previous bulletins, ensuring that operators have the most current information regarding engine control systems.

• This Service Bulletin applies to the Cessna Citation VII with TFE731-4R-2S engines.
• Installation of the N1 DEEC is mandatory for compliance with the STC ST01756CH-D.
• The weight difference when replacing the DEEC is -8.95 pounds per unit.
• Two manhours are estimated for the completion of the installation.
• Operators must ensure all N1 DEECs are the same part number and installed concurrently.