Section 43.10

14 CFR Ch. I (1-1-19 Edition)

of certificate held by the person approving the work. The signature constitutes the approval for return to
service only for the work performed.
(b) Each holder of an air carrier operating certificate or an operating certificate issued under Part 121 or 135,
that is required by its approved operations specifications to provide for a
continuous airworthiness maintenance
program, shall make a record of the
maintenance, preventive maintenance,
rebuilding, and alteration, on aircraft,
airframes, aircraft engines, propellers,
appliances, or component parts which
it operates in accordance with the applicable provisions of Part 121 or 135 of
this chapter, as appropriate.
(c) This section does not apply to persons performing inspections in accordance with Part 91, 125, Section 135.411(a)(1), or
Section 135.419 of this chapter.
(d) In addition to the entry required
by paragraph (a) of this section, major
repairs and major alterations shall be
entered on a form, and the form disposed of, in the manner prescribed in
appendix B, by the person performing
the work.

spaschal on DSK3GDR082PROD with CFR

[Amdt. 43-23, 47 FR 41085, Sept. 16, 1982, as
amended by Amdt. 43-37, 66 FR 21066, Apr. 27,
2001; Amdt. 43-39, 69 FR 44863, July 27, 2004]

Section 43.10 Disposition of life-limited aircraft parts.
(a) Definitions used in this section. For
the purposes of this section the following definitions apply.
Life-limited part means any part for
which a mandatory replacement limit
is specified in the type design, the Instructions for Continued Airworthiness, or the maintenance manual.
Life status means the accumulated
cycles, hours, or any other mandatory
replacement limit of a life-limited
part.
(b) Temporary removal of parts from
type-certificated products. When a lifelimited part is temporarily removed
and reinstalled for the purpose of performing maintenance, no disposition
under paragraph (c) of this section is
required if - 
(1) The life status of the part has not
changed;
(2) The removal and reinstallation is
performed on the same serial numbered
product; and

(3) That product does not accumulate
time in service while the part is removed.
(c) Disposition of parts removed from
type-certificated products. Except as provided in paragraph (b) of this section,
after April 15, 2002 each person who removes a life-limited part from a typecertificated product must ensure that
the part is controlled using one of the
methods in this paragraph. The method
must deter the installation of the part
after it has reached its life limit. Acceptable methods include:
(1) Record keeping system. The part
may be controlled using a record keeping system that substantiates the part
number, serial number, and current life
status of the part. Each time the part
is removed from a type certificated
product, the record must be updated
with the current life status. This system may include electronic, paper, or
other means of record keeping.
(2) Tag or record attached to part. A
tag or other record may be attached to
the part. The tag or record must include the part number, serial number,
and current life status of the part.
Each time the part is removed from a
type certificated product, either a new
tag or record must be created, or the
existing tag or record must be updated
with the current life status.
(3) Non-permanent marking. The part
may be legibly marked using a nonpermanent method showing its current
life status. The life status must be updated each time the part is removed
from a type certificated product, or if
the mark is removed, another method
in this section may be used. The mark
must be accomplished in accordance
with the instructions under Section 45.16 of
this chapter in order to maintain the
integrity of the part.
(4) Permanent marking. The part may
be legibly marked using a permanent
method showing its current life status.
The life status must be updated each
time the part is removed from a type
certificated product. Unless the part is
permanently removed from use on type
certificated products, this permanent
mark must be accomplished in accordance with the instructions under Section 45.16
of this chapter in order to maintain the
integrity of the part.

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