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|  MIL-G-85103B(AS)
3.2.5 Environmental requirements. Unless otherwise specified herein, the
gun system shall not suffer damage, deterioration, or degradation of performance
beyond the limits of this specification when subjected to any environment of any
natural combination of environments specified herein. Unless otherwise
specified herein, the gun system shall sustain steady state firing after being
subjected to the applicable environmental tests as specified in 3.2.5.1 through
3.2.5.11.
3.2.5.1 Altitude. The gun system shall sustain steady state firing while
bing subjected to ambient pressures at altitudes from sea level to 15,200 m
(50,000 ft) (see 404.2.1.1).
3.2.5.2 High temperature. The gun system shall redesigned to be capable of
withstanding continuous exposures to 93 degrees Celsius (C) and intermittent 5-
minute exposure to 121C. The gun system shall sustain steady state firing after
being subjected to 4 hours exposure at 71C (see 4.4.2.1.2).
3.2.5.3 Low temperature. The gun system shall sustain steady state firing
while stabilized at -54C (see 4.4.2.1.3). The performance may be degraded
during exposure to -54C temperature as follows (see 4.4.2.1.3):
a. Fire a minimum of 35 rounds in first second after trigger on.
b. Firing rate shall be 3,000 rounds per minute or greater.
3.2.5.4 Humidity. The gun system shall sustain steady state firing after
being subjected to humidity tests (see 4.4.2.1.4).
3.2.5.5 Solt fog. The contractor corrosion control program shall ensure
control of corrosion in the earliest design states Of the system design and
equipment development. The gun system shall sustain steady state firing after
being subjected to 144 hours of salt fog (see 4.4.2.1.5).
3.2.5.6 Rain. The gun system shall sustain steady state firing while being
subjected to the rain test (see 4.4.2.1.6).
3.2.5.7 Sand and dust. The gun system shall sustain steady state firing/
cycling after being subjected to the sand and dust tests (see 4.4.2.1.7).
3.2.5.8 Vibration. The gun system shall withstand, without damage, and
shall sustain steady state firing after vibration tests (see 4.4.2.1.8).
3.2.5.9 Fungus. The materials selected for the gun system shall be non-
nutrient for fungus Or shall have fungus resistant treatment in accordance with
MIL-T-152 (see 4.4.2.1.9 and 6.2).
3.2.5.10 Acceleration.
3.2.5.10.1 Nonfiring during acceleration. After being subjected to the
acceleration levels specified in Table III, the gun system shall not sustain
damage and shall sustain steady state firing after the tests (see 4.4.2.1.10.1).
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