Cessna Citation CJ2+ — Maintenance Manual

This service letter, SL525A-21-03, provides instructions and parts for replacing the air conditioning compressor motor fan on Cessna Citation models 525A (CJ2) and 525A (CJ2+). It details the compliance requirements, which are optional and at the discretion of the aircraft owner. The document outlines the necessary steps for the installation of an improved fan blade, including safety precautions and maintenance practices. It emphasizes the importance of following the instructions precisely and using only approved parts to ensure compliance and safety. The letter also includes information on material availability and labor hours required for the modification.

• Models affected: Cessna 525A (CJ2) serial numbers -0001 thru -0244 and Cessna 525A (CJ2+) serial numbers -0300 thru -0524.
• The new fan blade part number is K1134608-3, replacing the old part number 1134608-1.
• Compliance with the service letter is optional and must be documented in the aircraft logbook.
• Safety precautions include grounding the aircraft and disconnecting electrical power before maintenance.
• Labor hours for the modification are variable and depend on specific maintenance conditions.