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C. FLASHING, FLICKERING, OR INTERMITTENT
OPERATION
The image may appear to flicker or flash. If there is more than
one flicker, check for loose battery adapter or weak battery.
Return the ATN NVM-14 to the maintainer.
D. COSMETIC BLEMISHES
These are usually the result of manufacturing imperfections that
do not affect image intensifier reliability and are not normally
a cause for rejecting ATN NVM-14. However, some types of
blemishes can get worse over time and interfere with the ability
to perform the mission. If you believe a blemish is a cause for
rejection, record the specific nature of the problem on the main-
tenance forms and identify the position of the blemish by using
the clock method and approximate distance from the center (e.g.,
5:00 toward the outside, 2:30 near the center, or 1:00 midway).
The following are cosmetic blemishes:
1. Bright Spots.
A bright spot is a small, non-uniform, bright area that may flicker
or appear constant (Figure 5-3).
Not all bright spots make the ATN NVM-14 rejectable. Cup
your hand over the lens to block out all light. If the bright spot
remains, return the ATN NVM-14 to the maintainer. Bright spots
usually go away when the light is blocked out. Make sure any
bright spot is not simply a bright area in the scene you are view-
ing. Bright spots are acceptable if they do not interfere with
the ability to view the outside scene and the ability to per-
form the mission.