MIL-DTL-52543E
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection in accordance with 4.2.
3.2 Description. The marker light (hereinafter referred to as "light") shall consist of a
light assembly, a ballast bag and four anchor pins (see 6.5).
3.3 Materials. Materials shall be as specified herein. Materials not specified shall be
selected by the contractor, shall be of the lightest practicable weight suitable for the purpose
intended, and shall be subject to all provisions of this specification. The material shall be free
from all defects and imperfections that may affect the quality and reliability of the finished
product. Lights fabricated of materials other than those specified herein, and any design changes
required due to use of such materials, shall be subject to approval of the contracting officer.
3.3.1 Materials deterioration prevention and control. The light shall be fabricated from
the compatible materials, inherently corrosion resistant or treated to provide protection against
the various forms of corrosion and deterioration that may be encountered in any of the applicable
operating and storage environments to which the light may be exposed. Plastic inherently
susceptible to deterioration in the ultraviolet light shall be treated (i.e., ultraviolet stabilized) for
the effects of ultraviolet light exposure, except for plastics whose functions would be adversely
affected by such treatment. When specified (see 6.2), a certification of ultraviolet treatment to
plastic components shall be provided.
3.3.1.1 Dissimilar metals. Dissimilar metals shall not be used in intimate contract with
each other unless protected against galvanic corrosion. Dissimilar metals and methods of
protection are defined and detailed in MIL-STD-889.
3.3.1.2 Identification of metals and finishes. The contractor shall identify the specific
material, material finish or treatment for use with components and subcomponents, and shall
make information available upon request to the contracting officer or designated representative.
3.3.2 Recycled, recovered, or environmentally preferable materials. Recycled,
recovered, or environmentally preferable materials should be used to the maximum extent
possible, provided that the material meets or exceeds the operational and maintenance
requirements, and promotes economically advantageous life cycle costs. Used, rebuilt or
remanufactured components, pieces and parts shall not be incorporated in the light.
3.4 Construction. The light shall be constructed so that parts will not work loose, and
replacement of the battery, dome, deflector, and lamp can be made by personnel without the use
of special tools.
3.5 Operation. With the light switch (see 3.6.5) in the "ON" position, the light shall emit
a steady glow. With the switch in the "OFF" position, the light shall be completely extinguished.
With the switch in the "FLASH" position, the light shall flash in accordance with the flashing
frequency and on-time as specified in 3.6.6.
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