MIL-DTL-62270B(AT)
3.5.1.3 Identification and data plates. All plates shall be in accordance with applicable
drawings (see 4.8.1).
3.6 Environment requirements.
3.6.1 Environments. The chassis shall operate in ambient air temperatures of plus
(+) 115 degrees (°) Fahrenheit (F) to minus (-) 25°F and, with special equipment installed, at
temperatures of -65°F. The chassis, when prepared for storage, shall withstand climatical
extremes of +160°F to -65°F without deterioration of any component (see 4.9.1).
3.6.2 Vibration and noise level.
3.6.2.1 Equipment operation. Equipment in operation shall not exceed the maximum
acceptable noise levels specified in table II (see 4.9.2).
3.6.2.2 Operator protection. Noise levels at crew positions shall not exceed 100 dB(A).
Noise hazard caution signs shall be posted in all crew stations. The signs shall be clearly visible to
all personnel (see 4.9.2).
TABLE II. Maximum acceptable noise levels for military equipment (continuous noise).
Octave band
center frequency
Maximum acceptable noise level
[Hertz (Hz)]
[decibels (dB) ref. 0.0002 microbar]
63
121
125
111
250
103
500
102
1000
100
2000
100
4000
100
8000
100
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are
classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspections (CI) (see 4.3).
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