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A Component Maintenance Manual (CMM) is the documentation created by the original equipment manufacturer (OEM) for an aircraft line replacement unit (LRU.) It typically includes a description of operation, specifications, testing requirements, special tools and fixtures, disassembly instructions, assembly instructions, and an exploded image of the component along with part numbers (illustrated parts list.)

The FAA refers to CMMs as Instructions for Continued Airworthiness (ICA.)

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Related Questions

What does CMM stand for in aviation maintenance?

Component Maintenance Manual


What is the difference between Aircraft Maintenance Manual and Component Maintenance Manual?

AMM is a manual which deals with removal & installation of an aircraft component or LRU's. It does not give any information of O/H. This type of maintenance generally performed in line maintenance. CMM is a manual which deals with O/H of an any aircraft component and generally IPC used to attached with it & this maintenance is also known as shop maintenance


What is aircraft component maintenance manual?

There are many manuals used for aircraft maintenance such as the Aircraft Maintenance Manual (AMM), Illustrated Parts Catalogue (IPC), Structural Repair Manual (SRM) and the Component Maintenance Manual (CMM). The AMM shows you how to remove, refit and test a component but to overhaul or repair the item, you will need the CMM as it describes how to strip, inspect and repair each item.


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It depends on what component maintenance manual you are referring to? Any maintenance manual is a guide to maintaining something, probably giving step-by-step instructions. A typical example are the many maintenance guides produced for owners of specific cars - which give detailed DIY home maintenance instructions.


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