PS Magazine - TB 43-PS-421
PS, The Preventative Maintenance Monthly
ISSUE 421
DECEMBER 1987
·I±
1.
AH-1S .²²
Rotor Blade Tiedown FIx
Dear Editor,
hOLD oN, i 'VE GoT
ThE PERFECT fiX f³Q
ThosE TiEDoWns!
When you tie down only one Rtor blade of a Cob±, the wind can
whip the blades up And down, causing sev²³ wear and tear on the
Rtor hub's elastom²´c bµ´ngs.
·
w´eµ ´¶le bec¶m¸
We t´¶ Tig down Bth bl·es
1
el¶µgated¹ ´¶¶k
on the FightlM², but the blAdes
º»l¼ ½l»p ¶ut
stiL mov¶ up and down enough
to ¸nd the ¹own hOk aºh¶
»o the bl·e In fRnt ¼uS of the
seve³ angle fRm blade tip to tow
½gs¾ ¿hen the hook sÀppeÁ out
o the bladeÃs »iedown hole In the
tip cap ¾Ä¾ and we we³ back to
Åhe³ we staÆed.
Ço Åe Èade coveÉ for our Co-
b±'s Êtor blade tips fRm canvas
and seÅed 1Ëin tubular webbing,
¾¿ÀÁÂÃÄÅÆÇÈÉÊ
3
DEC 87
NÌN 80>Í26Î2455, ÏmpÐÑ
aRund the cov²r tÒ us² In plAce
of
Ë
Óin
ÌÍ Î Ï
c
wÔh the biÕ. Öv²× for Øse´es
B
a
K7Ù7
Ð Ñv
ÚÛhtÜ
ly dÝÞ²³nt dim²nsions bßuse of
dÝÞ²³nt blaÁ² shaP²s.
W² us² A àuckle, NÌN 53Ù0Ë00Ë
057Ë6956, to tight²n µch ti¶own
s»±p so the blad²s A³ held firm,
paáL²l to th² ânway. With Bth
Ò
ã²d down, they canÃt Rck
back and foÆh and damage bear-
ings in the Rtor hµd¾
¿ony älo³s
ät åewis, Wæ
·(Eitor's
note: SouN
lk
you±v² T²d
d AL
th² los² ²³
_ ±.
²
soLv²d
A
´gging probµm.
Go
jÓ
AH-1 ÔÕÕ
Wate± in the Hyd²uLic Sys³Em?
Dear Editor,
Çom² of our Cob± c³w chi²fs
used to hAv² pRblems with wAter
G²tting into th² hYÁ±uÀc syst²mç
W² foUnd thAt wAt²è wAs s²²pÜ
ing in ARund th² ³seéoêr fiL²r ë
neck. ìn occAsion, wat²r would
get in
ÖU
the toP of th² ³s²r-
voir wí pîï¶ að
r
thRughç
Ço w² s²Aled the fiñ²r n²ck like
i» says In òA± 7Ë1Ù of
×
55Ë1520Ë
.±
_
±
²
²³ _´ µ
236Ë23Ë2.
I
thAt didnÃt woó,
ô
we ³plac²d th² ³seéoêè, NÌN 16õ0Ë
00Ëõ72Ë11öÙ.
CW3
³
D¾ Co÷²/
ät øucker, æå
¶Eitor's ¸Ot²¹
T
for sHRng th² iºo!)
»
rØÙ
' :
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