PS Magazine - TB 43-PS-722
PS, The Preventative Maintenance Monthly
ISSUE 722
JANUARY 2013
58
PS 722
JAN 13
Reporting MAC Hours
Dear Half-Mast,
I have a question about the Maintenance Allocation Chart (MAC). Maybe
it’s a silly one, but I’m asking because I’m being told different things. Do the
MAC hours reflect time per person? Should I multiply hours when the task calls
for more than one mechanic, or was the time already adjusted for additional
personnel?
For example, if the MAC states replacing a truck engine takes 22 hours and
requires two mechanics, does that mean the total hours I report is 44?
SGT W.G.
Dear Sergeant W.G.,
Thanks for asking. Hey, the only silly question is the one someone’s afraid to ask!
The 50/50 chances of getting this one wrong are too high.
Yep, times on the MAC already include the total time it should take the speciFed
number of personnel to complete the job. So if the MAC calls for 22 hours and it takes
two mechanics to complete the task from start to Fnish, each mechanic should receive
11 man-hours credit.
Does it really matter if man-hour reports are right? You betcha. If maintenance
managers can’t quantify each shop’s workload by man-hours, then they can’t schedule
work efFciently.
When inaccurate data is sent to DA, it paints a false picture of the man-hours
needed to repair equipment. This can lead to maintenance managers at any level
making decisions based on the wrong info.
Bottom-line, the man-hours you report affect your unit’s budget.
Underreporting
may cause your unit to lose mechanic slots.
Overreporting
is wasting
money, and can likewise lead to personnel cuts or reassignments if DA
determines unit maintenance funds were mismanaged.
Kudos to you, Sergeant, for not guessing but requesting ofFcial guidance.
Use UOCs for HMMWV Thread Protectors
Dear Half-Mast,
Item 4 in Fig 217B of TM 9-2320-387-24P shows a thread protector used
on the seat mounting studs of the battery box cover. Is that thread protector
used on all HMMWV commander’s seats or just on the M1113 and above?
G.C.
Dear Mr. G.C.
The headshed says that for the commander’s seat referenced in the TM, use the
tapered spacer (thread protector), NSN 5365-01-380-7340, for all models except
the M1114.
References to front seat conFgurations are different than the commander’s seat,
however. So use the following information to clarify the commander’s seat and front
seat info for HMMWVs.
•
Item 4 in ±ig 217B of TM 9-2320-387-24P: Use the tapered spacer, NSN 5365-
01-380-7340, on the commander’s seat for up-armored HMMWVs with usable on
codes (UOCs) TTA, TTT, TT1, UUA, UUU, UU1 and UU2.
•
Item 4 in ±ig 216 of TM 9-2320-387-24P: Use the tapered spacer, NSN 5365-01-
380-7340, on the M1113 commander’s seat (UOC XAA).
•
Item 23 in ±ig 231 of TM 9-2320-280-24P: Use the tapered spacer, NSN 5365-01-
380-7340, on the commander’s seat for legacy HMMWVs with UOCs AVY, A11,
A13, A14, A15, A20, A24, A25, A26, A27, BVY, B15, B16, B17, B18, B20, B24,
B25, C17 and NNN.
•
±ig 230 in TM 9-2320-280-24P: A different conFguration is used for the front seats
in legacy HMMWVs with UOCs HVY, H11, H13, H14, H15, H16, H17, H18, H20,
H21, H24, H25, H26, H27, H28 and MMM.
They do not use the tapered spacer.
This information is also referenced in an upcoming Interactive Electronic
Technical Manual (IETM). The up-armor HMMWV IETMs are scheduled
for release in early 2013. The legacy HMMWV ETMS have an estimated
release of late 2013 to early 2014.
Get Replacement HMMWV A/C Caps
Dear Half-Mast,
I am writing in regards to the HMMWV with the A/C installed. My primary
focus is the M1151A1 high pressure and low pressure service port caps.
I have been unsuccessful at finding replacement caps. I do not see an
illustration for them in any of the TM’s. There wasn’t an NSN provided in the
Maintenance Action Message MA11-004 either. They can be locally purchased
but our contract requires as much as possible to be ordered through the supply
system with an NSN.
I.C.
Dear I.C.,
The TACOM headshed says that you need NSN 5340-01-548-4825 for the
blue low pressure cap and NSN 5340-01-547-6786 for the red high pressure
cap. They also said these items will be included in the next revision to the
technical manual.
MSG
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722 58-59.indd
1-2
11/26/12
5:48 PM
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