MIL-DTL-6484D
3.2 Components. The cockpit utility light shall consist of the following major components:
Item No.
Paragraph No.
Item Name
1
3.8.1
Housing Assembly
2
3.8.2
Focusing device
3
3.8.3
Rheostat
4
3.8.4
Lamp socket
5
3.8.5
Filter assembly
6
3.8.6
Switch
7
3.8.7
Mounting base
8
3.8.7.1
Mount
9
3.8.8
Cord
10
3.8.9
Lamp
3.3 Precedence. When the requirements of this specification and the applicable specification sheet or MS17245
are in conflict, the requirements of the specification sheet or MS17245 shall govern.
3.4 Selection of specifications and standards. Specifications and standards for necessary commodities and
services not specified herein shall be selected as provided in 3.4.1.
3.4.1 Standard parts. Standard parts (AN, MS, etc.) shall be used wherever they are suitable for the purpose,
and shall be identified on the drawings by their part numbers. Commercial utility parts such as screws, bolts, nuts,
cotter pins, etc., may be used, provided they possess suitable properties and are replaceable by the standard parts
without alteration, and provided the standard part numbers are referenced in the parts list and on the contractor's
drawings. In the event there is no suitable corresponding standard part in effect on date of invitation for bids,
commercial parts may be used provided they conform to all requirements of this specification and applicable
specification sheet or MS drawing.
3.5 Materials
3.5.1 Protective treatment. When materials are used in the construction of the cockpit light assemblies that are
subject to deterioration when exposed to climatic and environmental conditions likely to occur during service usage,
they shall be protected against such deterioration in a manner that will in no way prevent compliance with the
performance requirements of this specification. The use of any protective coating that will crack, chip, or scale with
age or extremes of climatic and environmental conditions shall be avoided.
3.6 Design and construction. The design of all cockpit utility light assemblies shall be of sufficiently rugged
construction to withstand the shocks, vibrations, and other conditions incident to shipping, storage and their
installation on aircraft. The cockpit light assemblies shall be no larger than the envelope dimensions and shall operate
on voltage as shown in the applicable specification sheet or MS drawing. Assemblies of slightly different design will
be considered as meeting the requirements providing the specified and limiting dimensions, mounting holes,
connections and other requirements of this specification and the applicable specification sheet or MS drawing are met.
3.6.1 Adjustment. The light assemblies shall be so constructed that adjustments and repairs can be easily made
by personnel of operating units without the use of special tools.
3.6.2 Insulation. The insulation of each cord and light assembly shall withstand a breakdown test, without
failure, when a minimum of 750 volts RMS AC is applied.
3.7 Performance.
3
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