848 

14 CFR Ch. I (1–1–19 Edition) 

§ 43.10 

of certificate held by the person ap-
proving the work. The signature con-
stitutes the approval for return to 
service only for the work performed. 

(b) Each holder of an air carrier oper-

ating certificate or an operating cer-
tificate issued under Part 121 or 135, 
that is required by its approved oper-
ations 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 ap-
plicable provisions of Part 121 or 135 of 
this chapter, as appropriate. 

(c) This section does not apply to per-

sons performing inspections in accord-
ance with Part 91, 125, § 135.411(a)(1), or 
§ 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 dis-
posed of, in the manner prescribed in 
appendix B, by the person performing 
the work. 

[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] 

§ 43.10

Disposition of life-limited air-

craft parts. 

(a) 

Definitions used in this section. 

For 

the purposes of this section the fol-
lowing definitions apply. 

Life-limited part 

means any part for 

which a mandatory replacement limit 
is specified in the type design, the In-
structions for Continued Airworthi-
ness, 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 life- 

limited part is temporarily removed 
and reinstalled for the purpose of per-
forming 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 re-
moved. 

(c) 

Disposition of parts removed from 

type-certificated products. 

Except as pro-

vided in paragraph (b) of this section, 
after April 15, 2002 each person who re-
moves a life-limited part from a type- 
certificated 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. Ac-
ceptable methods include: 

(1) 

Record keeping system. 

The part 

may be controlled using a record keep-
ing 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 sys-
tem 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 in-
clude 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 non- 
permanent method showing its current 
life status. The life status must be up-
dated 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 § 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 accord-
ance with the instructions under § 45.16 
of this chapter in order to maintain the 
integrity of the part. 

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