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Explains the maintenance concept for CFM56 engines, focusing on monitoring engine health.
Differentiates between planned and event-driven borescope inspection types.
Overview of engine components and sections: Fan, HPC, Combustor, HPT, LPT.
Discusses limitations related to probe size and engine temperature during inspection.
Covers materials, equipment, and checks for borescope resolution and targets.
Explains methods for rotating the engine core manually or with pneumatic drive.
Explains how to set a reference angular position for the fan rotor.
Details inspection areas and possible defects for fan and booster blades.
Describes the general method for inspecting HPC blades, including VSV operation.
Explains the procedure for obtaining the zero reference position for the N2 rotor.
Outlines inspection areas and possible defects for HPC rotor blades.
Details inspection of SAC liners, dome area, and defects.
Covers inspection of DAC liners, dome area, and defects.
Details HPT inspection procedures for nozzles and rotor blades.
Explains LPT inspection procedures, blade areas, and common defects.
Table listing blade counts for CFM56 engine models.
Lists recommended service bulletins classified by ATA chapter, subject, and engine applicability.
Presents diagrams illustrating different engine sections and models.
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General