PS Magazine - TB 43-PS-595
PS, The Preventative Maintenance Monthly
ISSUE 595
JUNE 2002
Avenger Missile System…
Avenger Missile System…
O
ne Avenger cable you don’t ever want to work loose is the W103 cable for the envi-
ronmental control unit/primary power unit (ECU/PPU). The W103 has a shielded
ground. If the cable loosens, it arcs and can start a fire. You could be cooked in the
turret.
During your before-operation PMCS, check
all
the cables between the ECU and
PPU for looseness, but pay special attention to the W103.
Firmly grasp the W103’s connector
and try to turn it clockwise. If you can
move it at all, your repairman needs to
tighten it to 95-105 in-lbs. Even if you
can’t budge the W103, but suspect it
might have problems, get your repair-
man to check it. Better safe than sorry.
Repairmen, remember that you’re
supposed to check the W103’s torque
every 250 hours of operation or semi-
annually, whichever comes first.
This is spelled out on Page 2-13 of
Table 2-1 in TM 9-1440-433-24-1.
The W103 torquing procedure is in
Para 19-31 in TM 9-1440-433-24-2.
To properly torque the W103 connec-
tor on the bottom of ECU, you must
remove the antenna bracket and W101
and W102 cables.
PS 595
JUNE 02
50
AH-64A…
Dear Editor,
Even though MWO 1-1520-238-50-50 moved the AN/AVR-2A laser
detection comparator and the AN/APR-39A digital processor into the
Apache’s left avionics bay (L295) to keep them dry, water leaks still
happen.
When we wash the bird, water enters the bay through the vent above
the L295 bay door. That water can short out the components and cause
corrosion.
But we’ve come up with a quick
fix that plugs the vent and keeps
pesky water and other contami-
nants out of the bay. Just order
some cushioning material, NSN
8135-01-005-8974. This foam
is used to shadow most tool
boxes. Cut a 1-in thick piece of
plastic foam 6 X 6.25 inches.
Attach
a
REMOVE
BEFORE
FLIGHT flag with elastic cord,
NSN
Then shove the foam into the
opening and you’re ready to wash.
SGT Glenn Layne
D Co, 1-183 Avn Bn
Idaho ARNG
From the
desk of
the
Editor
Great job! That
foam will keep the
water at bay.
[phew]
you sure
could stand
a
good
bath!
you’re
tellin’ me! but
plug up my
vent first…
…that
water can do
a number on
my avionics!
Uh-oh…
somebody
forgot to
check the
w103 cable!
Insert foam into
vent before washing
Turn W103 clockwise
to check for looseness
Remove
antenna
bracket and
W101 and
W102 cables
to torque
W103
595. 50-51 (C)
4/22/02
11:33 AM
Page 1
Back to TopBack to Top
