PS Magazine - TB 43-PS-412
PS, The Preventative Maintenance Monthly
ISSUE 412
MARCH 1987
. !
., :
'
±
1
I,
I
UH-60A .±²
The same goes fr the stAbilator actuator rod. Keep it cleAn. Hydraulic Fuid
wiLl t±ke care o² the dirt and crUd. But i³ you seE any rust, crocus cloth is what
you neeD. NSN 5350-´-221µ¶872 gets a package o² 5¶.
36
MAR 87
-
±
²³
TEST THE Bim ONL ² a³
SCHEDULED b² tHE t´µ
Some o² you Black Hawk pilots are testing the BI (Blade ·nsPction Method)
pressuR i¸dicators duri¸g eve¹ preº»ght
·
insPction, even though it's not requir¼.
½very time you make the test, some
o² the nitrogen inside escaPs. There's
no way to avoid it, even i² the manual
lever on the pressure indicator is pressed
in ¾rmly to prevent excessive nitrogen
b¿eed-oÀÁ
When enough pressure escapes, the
BI indicators change Âom ye¿low (sa²e) to red (unsaÃ) and the system has to
be serviced.
That means an
extra burden
on
the meChanic and
tAxpayer.
SeQuence No.
¶·9
o² TM 55Ä
152¶-237-ÅMSµÆ
cl
fr tesÇng the
¸
rotor b¿ade
Normal pressure
Low preSsure
(³afe condition)
(´nsaFe condiTion)
prsu
indicAtors
´µ¶·¸·µ¹µµ·¸¸·¸·····º•
every 1¶ Fight hours or 14 dAys, whichever comes ¾rst.
ThatÈs
¹º
that's reQuired, biÉdÊenË Ìet weÍÎ enougÏ alone.
37
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