MIL-PRF-38039D
legends and warning lights shall be deactivated when the control is released. The master
warning, master fire warning, and master caution lights must be reset.
3.5 Interface.
3.5.1 Light source. The indicator light source shall be replaceable without the use of
special tools.
3.5.2 Finish. All nonfunctional portions of the system exposed to view from the cockpit
shall be finished in lusterless gray or lusterless black (see 6.2 and 6.3.2).
3.5.3 Color and light diffusion. The color and light diffusion characteristics of
components of an individual indicator shall be in accordance with MIL-STD-411.
3.5.3.1 Legend. The legend for components of an individual display shall be in
accordance with JSSG-2010.
3.5.4 Control panel. The control panel for the grouped indicators shall be in accordance
with MIL-DTL-7788, where applicable. Master warning, master fire warning, master caution,
and summation (if used) lights that indicate the condition of an entire subsystem shall be set
apart from the indicators which show the status of the subsystem components. The location of
critical function indicators, if any may be specified by the procuring activity (see 6.2).
3.6 Performance.
3.6.1 Expected life. The warning caution, advisory, and press to test circuits shall have a
life of 2,000 cycles and the master warning, master fire warning, and master caution circuits shall
have life of 40,000 cycles without overhaul or repair (except for indicator light source
replacement).
3.6.2 Electromagnetic interference. The system shall meet the electromagnetic
interference requirements of MIL-STD-461 as specified for class ID equipment.
3.6.3 Dielectric strength. The system shall withstand a potential, applied between the
connector pins and the case, of 500V rms, commercial frequency, at sea level and 250V rms at
50,000 ft altitude pressure equivalent, without allowing current flow above 500 microamperes.
3.6.4 Structural integrity. There shall be no damage to the system electrical connector
or the case when a force of 60 pounds is applied to the connector along each of the three
mutually perpendicular axes of the case.
3.6.5 Power consumption. The maximum power consumption shall be as specified in
the acquisition documents (see 6.2).
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