MIL-DTL-62738A(AT)
3.5 Ownership and support requirements. The PWA shall meet the following logistics
requirements.
3.5.1 Interchangeability. Interchangeability tolerances should permit parts, subassemblies,
and assemblies to be used in their parent assemblies without regard to the source of supply or
manufacturer. Parts, subassemblies, and assemblies having the full range of dimensions and
characteristics permitted by the specification governing the part, subassembly or assembly should
be usable as replacement items without selection and without departure from the specified
performance guidelines of the parent items.
3.5.2 Identification marking. Unless otherwise specified (see 6.2), identification marking
shall be permanent and legible and shall include as a minimum the following.
a. Nomenclature "PRINTED WIRING ASSEMBLY, IGNITION INTERRUPT
DRIVER".
b. Military part number.
c. Manufacturer's cage code and name.
d. Manufacturer's serial numbers.
e. Contract number.
f. Symbol "U.S.".
3.6 Operating environment requirements. The PWA shall operate under the following
environmental conditions, without degradation in performance:
3.6.1 Temperature.
3.6.1.1 High temperature (operating). The PWA shall be capable of operation without
damage or malfunction at a high temperature of 125 degrees Fahrenheit (°F) (52 degrees Celsius
(°C) (without solar radiation).
3.6.1.2 Low temperature (operating). The PWA shall be capable of operation without
damage or malfunction at a low temperature of 20°F (-7°C). For ambient temperatures below
20°F, the test set shall be operated in a shelter.
3.6.1.3 High temperature (nonoperating). The PWA shall be capable of being stored and
transported in its case without damage at an ambient temperature of +160°F (+71°C).
3.6.1.4 Low temperature (nonoperating). The PWA shall be capable of being stored and
transported in its case without damage in ambient temperatures of -60°F (-51°C).
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