PS Magazine - TB 43-PS-633
PS, The Preventative Maintenance Monthly
ISSUE 633
AUGUST 2005
PS 633
39
All Aircraft…
Corrosion Treatment
Made Easier
PS 633
AUG 05
38
AH-64A/D…
When a pilot or co-pilot does pre-flights or maintenance
operational checks for the laser, stay out of harm’s way. That
means
never
stand near the nose of the bird during laser testing.
Lasers can damage your eyes and cause eventual blindness.
And that old song,
“I Can See Clearly Now,”
won’t apply to
you if you’re blinded by a laser.
Pay attention in the hangar and look for posted signs. If you
see a search light shining on the ground, that’s your cue a laser
test is about to begin.
Keep away from the front of the bird and do not look in the
direction of the laser. And, pilots,
always
inform soldiers in the
hangar before you start laser testing.
When it comes to eyesight it’s best to be safe rather than have
you say…
I can’t
see you!
This is one of
the
top cost
drivers
for
airframe
maintenance.
why is
that?
A
big
reason for the corrosion
is leaving off the pre-paint
treatment—Dow 19 process—at
the unit level because it’s not
easy or user-friendly.
in most cases, affected areas like the main
transmission housing, input modules, accessory
modules, intermediate gearboxes and tail
rotor gear boxes had received a primer and
a topcoat, but
not
the pre-paint process.
Applying the
primer and
topcoat
is better
than doing
nothing, but
the
best
corrosion
protection
requires the
pre-paint
process.
Chapter 5 of
TM 1-1500-344-23
specifies a
mixture
of
one gallon
of chromium
trioxide and
calcium sulfate.
CrO
3
+
CaSO
4
That’s what
someone will ask
if you mechanics
get caught in
the path of an
AH-64A or D
laser during
testing.
Can you see me
now?
Mechanics,
DA Form 2410
data indicates
corrosion
on various
magnesium
housings in
aircraft.
633.38-39(C).qxd
6/29/05
6:13 PM
Page 1
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