MIL-STD-2105D
Pre-Stressing is defined as those specific environmental effects (temperature, humidity, vibration) of paragraph 4.1.1 or the munition type specific Allied Publication (AP), which comprise the immediate history of the test item just prior to
the drop.
The following apply to the 40-ft (12m) drop test:
a. Category 1. Missiles, large rockets (not man carried), and tactical air released commodity items will be dropped at ambient temperature and will have previously undergone environmental pre-stressing in accordance with paragraph 4.1.1
or the munition type specific AP. The test items may be dropped
while conditioned to extreme temperatures to satisfy other requirements.
b. Category 2. All munitions that are not Category 1 shall be subjected to conditioning immediately prior to the test to simulate the likely worst case conditions at the moment of a free fall in the service environment. The environments to which the test item should be conditioned / pre-stressed shall be
determined by the responsible acquisition authority based on the
life cycle environmental profile and/or munition type specific AP. The test items may be pre-stressed to satisfy other requirements.
For items in category 2, the life cycle environmental profile shall determine the temperature extreme, to which the test item is conditioned. The extreme temperature, typically
-65°F (-54°C) and +160°F (+71°C), should be selected so as
to represent the hot or cold temperature at which historical
data on similar items has proved to be most sensitive to impact. Any other selected temperatures shall be justified in the safety data package and approved by lead service review organization.
5.1.4.6 Passing criteria. The following describe the passing criteria:
a. No visible or audio reaction of the propellant/
pyrotechnic/explosive in the test item.
b. The test item remains Safe for Disposal: An item is Safe for Disposal: If the munition is unusable, it shall maintain its safety features including Explosive Ordnance Disposal (EOD) features in a condition which will permit its
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