PS Magazine - JANUARY 1981
PS, The Preventative Maintenance Monthly
ISSUE 338
JANUARY 1981
l
1±
'1
When mounting your bird, one
place you never want to plant youR
brogans is on an "open± auxiliary
power unit Door. The duDe rests right
on the lef²-hand engine exhaust and
your weigHt on the door will crack the
²ailpipe.
³o Help you wi²H your maintenance
tAsKs, comBa² support Aviation com´
pAnies Are now authorizeD por²abLe
mAiN²eNAnce crAnes in TM 55-1520µ
237-23P (¶pr 80).
Since you do not have a daily
inspection, show your stuFF on the
:-
daY/ 10·hr inspection spelled out
m
TM 55µ1520-¸3¹µºMSµ»¼
½
¾ocus on the biFilaR ¿eights, For
reaLÀ Sequence 6À8 oF the pub saÁs to
lube: the biFilar bushingÂ, pins and
washer with
Ã
ÄubRiÅLate Æ30ÇÇÈ Éou
can get a ʵLb paiL wiËh
NSN
91Ê0Ì00Ì
663Ì1¹¹0Í
The bifilar Lube cHore is DetermineD
by operating conDi²ions. I²'s a gooD
iDeA, tho, to mAke with the grease
eVery 5-DAy
/
10µHr inspec²ion. If those
weigHts Do no² moVe freely, they wonβ
dAmpen ou² airframe ViBrAtions.
ÏoUÎll get A 4-toµÐ vÑbrAtioNÒ4 beats
for eVery rotAtion of ²He rotor.
Óse A cLean rAg to wipe ofF the crud.
TheN Add a thin coAting oF geneRal
purpose greAseÀ Ôe sure you lube the
²op AnD bo²²om of eAch wAsher.
\
-±²³
´
µ
'
±
I
±=
,
.²
²
-_
b²
±
WHeN you ²Es² ²He servÕCeaBÕÖײy of
W
±
²HE mAÑN ro²or BlADes wÑtH tHe
0
Ø
²
ÙÚ_Ûressure inDicAtor, press iN oN ²He
-
ÜÝANuAl leVer (grenADe-type HAnDle)
Þ
fÑrmly. ³His wÑll preveNt an eXcessiVe
ß
BleeDàoff of spAr pressUre cAuseD By A
á ÛAr²iAl opening of tHe VAlve plunger.
oN A dAily bAsis. âXcessive blaDE
²estiNg coUlD ReQuire serviciNg the
system with NÑtrogeN more oFten thAN
eVery 6 mon²Hs.
¶ cãeaN rAg comes in migh²y hAndy
As you mAke your rounäs, lÑke wheN
eyebAlling tHe main lAnDing geAr
lower shock s²ruts år Dirt and
ãi²tãe æydraulic ¾luiD,
MIç-æµ5è0è, on yoUr rAgéplus soÝe
elBow
greAseéwÑll remOve
ANy
BuÑlDUp of gri² from ²He Ûis²on aND
prEVeN² cU² seAls AnD HyDrAUlÑc leAKs.
êSê ëì50í00-252µè3î3 wÑll ge² you A
ìïQ² cAN.
³He sAmE DeAl goes for tHe
s²ABilA²or Ac²UA²or roD. ðeep it cleAN.
¶ lѲ²lE crocUs clo²H wÑll Also remoVe
ANy rUs² ²ñA² mAy HAVE formeD oN tHEò
roD.
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