PS Magazine - TB 43-PS-735
PS, The Preventative Maintenance Monthly
ISSUE 735
FEBRUARY 2014
40
PS 735
FEB 14
41
PS 735
FEB 14
m
ortar units were fortunate for several years to have the small arms readiness
evaluation teams (SARET) do much of their maintenance as part of RESET.
That’s over. Now units, speciFcally 91± small arms/artillery repairers, are totally
responsible for keeping their mortar systems at 10/20 standards. This includes the
M95/M96 mortar Fre control system mounted (M±CS-M), the M150/M151 mortar
Fre control system-dismounted (M±CS-D), and the M326 mortar stowage kit (MSK).
Small arms/artillery repairers need to make sure they receive training for these
systems through the Maintainer New Equipment Training (MNET). And once they
receive the training, they need to train the unit’s other 91±s. That way the unit won’t
lose knowledge when a trained 91± is transferred.
Request training through your chain of command. If you have mortar questions,
send an email to:
us.army.detroit.tacom.mbx.ilsc-mortar-systems@mail.mil
Or contact one of these TACOM POCs:
Kevin Horn, DSN 786-1219, (586) 282-1219, or email:
kevin.m.horn2.civ@mail.mil
Joe Leigh, DSN 786-1223, (586) 282-1223, or email:
joseph.t.leigh.civ@mail.mil
T
he M7 Spider munition dispensing set, NSN 1230-01-536-0128, has new operating
software that lets operators prevent sterilization of the munition control unit (MCU)
after a tamper event. Before, the MCU had to be replaced by the ammunition supply
point after a tamper event.
A tamper event occurs when the MCU detects a tilt or other motion, movement of the
power switch, or removal of critical components like the munition or battery cover.
Here’s how the new software affects the MCU response:
What’s the difference between sterilization and zeroization? Sterilization is the
immediate destruction of system crypto, COMSEC, TRANSEC, hope set and message
authentication key variables, followed by the arming fuse being blown and the batteries
drained. Once that happens, the MCU has to go to depot to be reworked.
Zeroization, on the other hand, wipes out the same key variables, but once the
MCU batteries are removed and reinserted, the MCU is back in business. No trip to
depot is necessary.
Old MCU
(TS04) Action
Tamper
type
Power switch
movement
Tilt (motion)
Removal of critical
components
15-minute delay
sterilize
15-minute delay
sterilize
Sterilize
immediately
New MCU
(TS09) Action
15-minute delay. Disable timer begins count-
down to zeroization once in sense mode
15-minute delay. Disable timer begins count-
down to zeroization once in sense mode
15-minute delay. Disable timer begins count-
down to zeroization once in sense mode
Mortars…
train
to
maintain
M7 Spider
Munition
Dispensing
Set…
New Software
PREVENTS
Sterilization
well, now you’re
totally responsibLE
for keeping me in
top shape.
No
more
SARET
help.
y’know, I
haven’t
had
much mortar
training.
then schedule
some tHrouGh
MNET!
sterilization
versus
zeroization?
No ConTest!
this new
software
is going
to save me
lots of
trouble!
735 40-41.indd
1-2
12/20/13
11:28 AM
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