Federal Aviation Administration, DOT

Section 45.21

(c) Except as provided in paragraph
(d)(2) of this section, no person may remove or install any identification plate
required by Section 45.11, without the approval of the FAA.
(d) Persons performing work under
the provisions of Part 43 of this chapter
may, in accordance with methods,
techniques, and practices acceptable to
the FAA - 
(1) Remove, change, or place the
identification information required by
paragraph (a) of this section on any
aircraft, aircraft engine, propeller, propeller blade, or propeller hub; or
(2) Remove an identification plate required by Section 45.11 when necessary during
maintenance operations.
(e) No person may install an identification plate removed in accordance
with paragraph (d)(2) of this section on
any aircraft, aircraft engine, propeller,
propeller blade, or propeller hub other
than the one from which it was removed.

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[Amdt. 45-3, 32 FR 188, Jan. 10, 1967, as
amended by Amdt. 45-10, 44 FR 45379, Aug. 2,
1979; Amdt. 45-12, 45 FR 60183, Sept. 11, 1980;
Amdt. 45-20, 55 FR 32861, Aug. 10, 1990; 55 FR
37287, Sept. 10, 1990; Amdt. 45-26, 74 FR 53395,
Oct. 16, 2009; Amdt. 45-28, 77 FR 76854, Dec. 31,
2012]

Section 45.15 Marking requirements for PMA
articles, TSO articles, and Critical
parts.
(a) PMA articles. The manufacturer of
a PMA article must permanently and
legibly mark - 
(1) Each PMA article, with the PMA
holder-s name, trademark, symbol, or
other FAA approved identification and
part number; and
(2) The letters  - FAA-PMA - .
(b) TSO articles. The manufacturer of
a TSO article must permanently and
legibly mark  - 
(1) Each TSO article with the TSO
holder-s name, trademark, symbol, or
other FAA approved identification and
part number; and
(2) Each TSO article, unless otherwise specified in the applicable TSO,
with the TSO number and letter of designation, all markings specifically required by the applicable TSO, and the
serial number or the date of manufacture of the article or both.
(c) Critical parts. Each person who
manufactures a part for which a re-

placement time, inspection interval, or
related procedure is specified in the
Airworthiness Limitations section of a
manufacturer-s maintenance manual or
Instructions for Continued Airworthiness must permanently and legibly
mark that part with a serial number
(or equivalent) unique to that part in
addition to the other applicable requirements of this section.
(d) If the FAA finds a part or article
is too small or otherwise impractical
to mark with any of the information
required by this part, the manufacturer
must attach that information to the
part or its container.
[Doc. No. FAA-2006-25877, 74 FR 53395, Oct.
16, 2009]

Section 45.16 Marking of life-limited parts.
When requested by a person required
to comply with Section 43.10 of this chapter,
the holder of a type certificate or design approval for a life-limited part
must provide marking instructions, or
must state that the part cannot be
practicably marked without compromising its integrity.
[Doc. No. FAA-200-8017, 67 FR 2110, Jan. 15,
2002, as amended by Amdt. 45-26, 74 FR 53395,
Oct. 16, 2009]

Subpart C - Nationality and
Registration Marks
Section 45.21 General.
(a) Except as provided in Section 45.22, no
person may operate a U.S.-registered
aircraft unless that aircraft displays
nationality and registration marks in
accordance with the requirements of
this section and SectionSection 45.23 through 45.33.
(b) Unless otherwise authorized by
the FAA, no person may place on any
aircraft a design, mark, or symbol that
modifies or confuses the nationality
and registration marks.
(c) Aircraft nationality and registration marks must - 
(1) Except as provided in paragraph
(d) of this section, be painted on the
aircraft or affixed by any other means
insuring a similar degree of permanence;
(2) Have no ornamentation;
(3) Contrast in color with the background; and
(4) Be legible.

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