PS Magazine - NOVEMBER 1982
PS, The Preventative Maintenance Monthly
ISSUE 360
NOVEMBER 1982
Need
a
Fine Scree±1
During the next Phase
Mainte-
nance on your Cobra, eyebalL the en±
gine FOD scReen. It's important.
screen.
Fig D²185 in TM 55³´520²236µ23
shows you how to make the screen but
not how to instaLL it. So, foLLow these
ste¶s:
Cut the screen in haLf, Lengthwise.
You're only alLowed an overLay of 2
·esh o¶enings and a .070²in ga¶.
To ¶revent overLa¶¶ing of your
screen on the back edges of the FOD
¸screen, make some wedge cUts in the
screen you made.
.1±
²
³´µ
¹ine your fine²mesH screen aLong
the Leaºing edge of tHe »OD screen.
·
Then, f¼rm the screen to the »OD
screen½
¾sing any of your stainLess steeL
Lock wire, secure one end of the screen.
-
.
If you only have the coarse-
±
mesh screen, you also need a fine²
mesh screen wrapped around it.
It seems that when MWO 55µ1520µ
221²30µ48 removed the buLky engine
air inLet screen, not aLl tHe aircraft got
the re¶Lacement fine²mesh screen
caLLed for in tHe mod.
NSN 9505²¿0²2
9
3²4208, for exam¶le,
wiLL do the trick. ¹ace every fifth
o¶ening aLong the Àuter ¶erimeter oÁ
tHe screen to the ÂOD screen.
'Course, you Have to cover both
halVes of the »OD screen.
To ¶revent the edge of the scrEen
from snagging your fingers durinG
maintenance, you can add some ProÃ
SeaL around the outer ¶erimeter.
40
Dear SÄeciaList
I
ȁ
G±,
_
ÆoÇ Èou neeÉ
Cl
(ÊËÌÍeB 8Î)
t0
ÏM
55²28³´µ229µ23¶
Ðara ѲÑÒ
Ó
Ôas tHe
Latest word.
A new or oveRhauled engine is firSt InStalled.
When maInTenance iS to be done that affectS
±
²
The fuel flow' aIr flow oR gaS paTh
?t
The eng³ne´
When a new baSelIne StanDard Turbµne
d
engIne analySiS check (¶EAC) ·S SchedUle ¸
·
When you're attaching the
Õ
Ö/Tײ
Õ
Ö cycLic hydrauLic servo Øo
the swash¶Late, as shown in DetaiL
B¸
Fig 7²20 of TM 55´520Ù22´µ23, you
: 'iJ
use 2 s¶ecial washers,PN ´Ú0²0¿7Û33Ü
28C4Ý N
d
SN 5
h
3´0
b
²
Þ
ß
Þ
µ
9
h
ÕÕ
²
d
944
Ó
d
. One
à
¹
!
goes un er
±
t e
o t
ea an one
under the nut.
I'
áSo far, so good!
H
j
If you can't line u¶ the cotter ¶in
³:´AµD
±
d
=w
¶
a
·
s
²
hE¸¹ rº» ¼A½
N
¾9
³
60
´
¿
µ
P
¶
À
·
8
¸
16
¹
Á
:;
N
º
N
»
Â
!º
wiâh the nut after yãu make äå
th the
53Ã0¿00-Ã67Ä075ÃÅunder the nutÆ It's
I
.
torque wrench, tho, it's OK to add a
LÇsTÈd in
Fig
252 of
TM
55ÄÃ520¿22ÃÉ23PÊ
±
regular fLat washer.
²j
41
I
t
"
:
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