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Chapter 12. Publications, Forms, & Records

§43.10 Disposition of life-limited aircraft parts

(Note the even number again; this regulation became part of 14 CFR part 43 in 2002.)

This section presents two terms not previously defined in 14 CFR:

Life-limited part means any part for which a mandatory replacement limit has been specified.
Life status means the accumulated cycles, hours, or any other mandatory limit of a life-limited part.

This section then goes on to specify what to do with parts that are temporarily removed from and then reinstalled on a type-certificated product.

With parts that are removed from a type certified product and not immediately reinstalled.
How to transfer life-limited parts from one typecertificated product to another.

When a life-limited part is removed, the person removing it from the type-certificated product must control the part and assure proper tracking of the life-limiting factor. This is to prevent the installation of the part after it has reached its life limit.

There are seven possible methods the technician or repair facility may choose from to comply with this requirement.

Recordkeeping.
Tagging.
Non-permanent marking.
Permanent marking.
Segregation.
Mutilation.
Any other method approved or accepted by the FAA.

When a life-limited part is transferred, the information concerning the life status of that part must be transferred with it. (Although regulations already did exist which required the tracking of life-limited parts when they were installed on an aircraft, this regulation was generated to govern the disposition of such parts when they were removed from the aircraft.)