Section III. SHOP INSPECTION
Inspection of Optical Components
a. Head Assembly. When looking through the
This section sets forth the procedure to be
followed by maintenance shops in performing inspection
head assembly of the periscope there shall be no
of periscope XM47 when removed from the end item and
objectional dirt smears, scratches, digs, condensate or
turned in to the shop for repair.
fungus growth. Chips and fractures are permitted
provided they are stoned or ground and do not extend
more than 1/4-inch beyond the clear aperture. In all
cases prime emphasis should be placed on performance
of the periscope rather than the optical appearance,
unless the latter definitely indicates poor workmanship.
periscope XM47 is initially received in the shop.
b. Body Assembly. When looking directly
through the viewing prism of the body assembly, all
optical surfaces must be free from dirt, digs, condensate
or fungus growth. Scratches are acceptable provided
Determine integrity of all seals with soap and
they are ground or stoned. Cement separations must
water solution as specified in 5-11a(10).
not extend more than 1/4-inch from edge of aperture.