PS Magazine - TB 43-PS-670
PS, The Preventative Maintenance Monthly
ISSUE 670
SEPTEMBER 2008
26
PS 670
SEP 08
Dear Chief W.C.O.,
Step 3 in the TM should read 0.250
inch (6.350 mm), so make a note in your
TMs until this is corrected. The rest of
Step 3 is correct:
“No more than four
cracks allowed per support. No more
than two cracks allowed in succession
in any direction. Original surface
imperfections are permitted.”
Dear Half-Mast,
TB 9-1000-247-34 says that cracks up to 1/4 inch long are permitted
at cooling holes, but Step 3 on WP 0020 00 in TM 9-1005-213-
23&P says “Cracks up to 0.025 inch (0.635 mm) maximum in length are
permitted at holes”. That’s quite a difference. What’s right?
CW3 W.C.O.
IT HAPPENED ON THE
HINDENBURG
M2 Machine Gun…
What Is
Cooling Hole Standard?
IT HAPPENED ON THE
HINDENBURG
Cracks can’t be longer than
0.25 inch (6.35 mm)
the
cooling
holes
info in my
tm is
not
right…
...a note
to half-
mast
saves me
from this
plight!
dateline: lakehurst
naval air station, new
jersey, may 6, 193
7
.
thirty-six people died
today when the zeppelin
lz129 hindenburg
burst
into a ball of flame and
plunged to the ground.
at 804 feet in length,
the hindenburg was the
largest rigid aircraft
ever built.
preventive
maintenance
city, usa, may
6, 2008.
after
7
1
years, the reason
the hindenburg
met its fiery
fate is being
investigated by
the army’s
ps
,
the preventive
maintenance
monthly.
the cause of the fire that
led to the destruction has
never been determined.
670.26-27.indd
1-2
7/31/08
3:50:35 PM
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