PS Magazine - TB 43-PS-607
PS, The Preventative Maintenance Monthly
ISSUE 607
JUNE 2003
PS 607
JUNE 03
26
W
e’ve said it before and now we’ll say it again: If your unit has any 7-ton trestles
(jack stands), NSN 3950-00-251-8013, they could be defective.
Trestles manufactured by Martinez and Sons, Inc., in 1979 have a defect that can
cause them to buckle and collapse if the load is off-center.
Take a look at the data plate. If it lists the manufacturer as Martinez and Sons,
Inc., and has a contract number of DAAA09-79-C-4216, you’ve got one of the
defective trestles. The “79” in the contract number refers to the contract year—
1979.
Defective trestles should be destroyed by crushing, cutting or any other method
that makes them unusable. Trestles that are missing data plates and can’t be other-
wise identified, should be condemned, too.
Martinez and Sons, Inc., had several contracts for 7-ton trestles between 1979 and
1990. So, if your 7-ton trestle was made by Martinez and Sons, Inc., in any year
other than 1979 or by any other manufacturer, it’s OK to use.
SOUM 092030Z Oct 87 issued by CDR AMCCOM has the scoop. Write to Half-
Mast at
psmag@logsa.redstone.army.mil
for a copy.
you ready?
We’ve got a
lot of lifting
to do today!
better
check my data
plate first! I
could be
defective!
T
he radio broadcast in
1938 by orson welles
and his mercury theater
on the air dramatizing a
martian invasion at
grover’s mill, new jersey
has been a part of history
for 65 years. the belief
was that it was nothing
more than a combination
of radio drama and a
population on the edge.
but…
was it?
607. 26-27 (C)
5/2/03
1:36 PM
Page 1
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