PS Magazine - TB 43-PS-601
PS, The Preventative Maintenance Monthly
ISSUE 601
DECEMBER 2002
Para 5, Page 2-115:
"When the mortar is
cool, gunner places the safety mechanism (2)
on SAFE (S showing) and shouts 'the safety is
on SAFE'."
Para 6, Page 2-116:
"The assistant gunner
physically confirms that the safety mechanism
is on SAFE (S showing). Squad leader confirms
actions of the gunner and assistant gunner and
checks the selection switch is on SAFE.
"If the assistant gunner agrees the safety is
on SAFE, he shouts 'safety on SAFE'. The
squad leader confirms the actions of the assis-
tant gunner and gunner and the misfire proce-
dures continue."
Para 7, Page 2-116:
"Gunner removes sight and sight extension. Assistant gun-
ner removes and stows blast attenuator device (BAD) (M121 only). Squad leader
confirms action of the gunner and assistant gunner."
Para 8, Page 2-117:
"Make sure
each cartridge extractor assembly
catch face has a
1
⁄
8
-in hole. If the
extractor catches don't have the
holes, don't use the extractor.
Assistant gunner inspects cartridge
extractor catches for burrs, wear or
corrosion that would prevent it from
doing its job. Assistant gunner
makes sure each extractor catch
moves freely and snaps back in posi-
tion. Problems? Don't use the
extractor. Go to Para 13, Page 2-121 and use the barrel tip method to remove the
misfired cartridge. The squad leader confirms the actions of the assistant gunner.
"Assistant gunner attaches the cartridge extractor securely to the extended
artillery cleaning staff assembly (4). Squad leader confirms actions of the assistant
gunner."
PS 601
25
Armorers and NCOs, before you go to the field again, train the crews with these
new PMCS and misfire procedures. Every 6 months, personally inspect the cartridge
extractors. In the field, have each mortar crew daily rehearse the misfire procedure
using the dummy round and cartridge extractor.
Never fire unless at least one fully functional cartridge extractor is available at
each firing point.
Check with your pubs clerk to be sure your TM account is up-to-date so that you
will receive the TM change that includes this new information. Also be on the look-
out for an MWO that will have stickers and decals to help you safely use the extrac-
tor. See your TACOM logistics assistance representative for details.
Check catches
for hole and
problems
Para 9, Page 2-117:
"Make sure the artillery
cleaning staff assembly sec-
tion sleeves (5) are all tight-
ly locked so that the staff
assembly will not extend or
retract. If the section sleeves
cannot be tightly locked,
then the cartridge extractor
assembly is non-mission
capable. Don't use it.
Proceed to Para 13, Page 2-
121 and follow the barrel tip
method to remove the mis-
fired cartridge. Squad leader
confirms actions of the gun-
ner and assistant gunner."
The rest of the misfire
procedure stays the same.
Sleeves
tightly
locked?
Sleeve
locking
points
Spring-loaded
sleeve covering
attachment point
ok, let’s try
that misfire
procedure one
more time.
Practice Makes Perfect
Changes to Misfire Procedure
TACOM Safety
of Use Message
(soum) 2-004 is
changing these
steps in tm
91015-250-10.
Until you get
the soum and
can update
your tm, use
these steps…
S showing?
Hole
Hole
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