SB 742-1
e. Check for compliance with drawing 12013695,
(11) Firing of 25mm with lost lot identity is
Characteristics, Linked Belt, 25mm, M28, using locally
prohibited.
fabricated 25mm gage and criteria in Table Z-2 below.
(12) All 25mm with lost lot identity (Lot UNKNOWN)
will be picked up on accountable records in condition code K
pending inspection and classification.
a. The M28 link is a two piece assembly intended to hold
and link the 25mm ammunition for guiding the ammunition
(13) Ammunition determined by inspection to be
through the weapon system. The assembly consists of
serviceable and lot number identified will be assigned
hardened steel main and pivot links hooked together and
appropriate condition code. Ammunition determined by
contoured accordingly for its intended purpose
inspection to be unserviceable and lot number identified will be
assigned appropriate condition code and reported through
b. Links for Cartridges, 25mm, M791, M792, M793, M910,
command channels to the commodity command.
and M919 shall be inspected to assure free hinging. Linked
25mm ammunition shall hinge freely and fold over smoothly
(14) Repack of 25mm ammunition. CONUS posts,
without binding, kinking, separating or any interference when
camps or stations without adequate personnel and facilities to
belt is pulled over itself. Each belt shall be laid out full length
perform inspection and processing of 25mm ammunition will
with open side of links up. One end shall be drawn over
report through command channels to HQ, JMC IAW DA PAM
remainder of belt until belt is completely reversed (open side of
738-750 for disposition.
link down). One end of reversed belt shall then be drawn over
(a)
Serviceability criteria.
remainder of belt until belt is returned to original (open side of
link up) position. Belt must hinge freely throughout this
b. Ammunition will meet the visual inspection criteria
process. Failure to hinge freely will be classified as a major
specified in basic portions of this SB and the additional criteria
defect..
in Table Z-1
(1) Restricted or suspended ammunition will not be
used in repack operations without specific authorization or
instructions from the commodity command.Lot formation
criteria. 25mm ammunition lots will be formed IAW basic
portions of SB 742-1.
(2) Field returns of loose 25mm rounds with lot
number not identifiable will be reclassified unserviceable and
reported to the commodity command for disposition. Records
and reports. DSR cards and accountable records will be
maintained IAW basic portions of SB 742-1.
c. Dummy 25mm ammunition.
(1) Inspect dummy cartridges for such defects as
damaged extractor groove/rim, damage that may preclude use,
corrosion, and loose projectiles.
(2) Dummy cartridges with defects other than those
specified above will be considered serviceable as long as their
intended purpose is unimpaired and they can be identified as
dummy.
d. Air test of 25mm container. Air test of M621 and
PA125 is not required during cyclic inspections. Air testing of
container is usually performed during maintenance operations
only. HQ, JMC will provide instructions for testing in SOW of
DMWR or LOI.
a. A standard gage has not been developed to measure for
correct positioning of link on cartridge. Engineering elements
have approved and made available drawings from which a gage
may be locally fabricated.
b. Drawings should be requisitioned from the office in
XM283910087.
c. Cartridges not fully seated in metallic link belts is not
cause for immediate rejection of the linked cartridge belt. If a
reasonable attempt to correctly reposition the cartridge in its
link fails (see Table Z-2 requirements), the linked cartridge belt
should then be rejected.
d. Incidental dents on the cartridge case shoulder are not
a cause for rejection. This condition does not affect
serviceability of ammunition.
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