PS Magazine - TB 43-PS-442
PS, The Preventative Maintenance Monthly
ISSUE 442
SEPTEMBER 1989
UH·60A .±²
f your Black Hawk's aUxiliary power
Unit (AP±) "high oil² waRiNg light
flashes wheN you Least expect it, or if
the AP± is spewing oil oN the ramp,
yoU may be overserviciNg the AP±.
Too much oil iN the AP³ sUmp is
almost as bad as Not eNoUgh oi´ iN tµe
sUmp¶
WheN yoU service ·he AP±, Frget
tµe oil sigh· gage¸ It gives a slight´y
disto¹ted ¹eadiNg because ·he AP± is
installed witº a Nose low at·itUde¸
Ins·ead, pUt yoUr ·¹us· iN the AP±'s
oil dipstick¸ Add oil gradually uNtil the
leve´ iN ·he sump is betweeN the ADD
aNd »³¼¼ ma½ks on ·he dipstick wheN
·he oil is cold¾
3³
Here's aNother AP± maiN·enaNce
·ip: ¿f you have random shutdowNs
with constaNtly changing B¿TE codes
ON ·he electroNic seqUeNciNg uNit, iN-
spect the connector betweeN the ÀP±
and ·he ES± Fr moistUre or corrosioN¶
SEP 89
a
.±²
Áf yoU fin mois·Ure or corrosion,
wiÃe it oÄ witº a cLÅan cloth¶ TºeN
coat the insiÂe of tºe ÃlUg with corroÆ
sion Ãreventive comÃoUnÂ, ÇSÇ
8030-
00±546²8637.
W
ºen yoUr TM says to clean the
ÈonÂed wasºers of yoUr BLacK Éawk's
main rotor sÃindLes with
cLoth, tºat's wºat it means¶
Át Âoes not mean yoU can Use
sanÂÃaÃer or wiÊe ÈrUsºes¶
Tºey
scratcº tºe ºËrÂÅne Èottom sUrface of
tºÅ wasºerÌ ÍhÅn yoU have to reÃlace
tºe wºoLÅ sÎinÂLe, LiÏe it says in SteÃ
4
of ÍasK
16,
ÍM
55²1520²237²23²7.
So UsÅ onLy aÈrasive cLotº to clean
tºÅ wasºersÌ YoU can geÐ a Ãackage of
50
sºeÅÐs wiÑ ÒÓÇ
³350´µ±192´5050.
EveN if you doN't fiNd aNy moistUre
or corrosion, disconnectiNg and reconÔ
necting the cannon ÃLUg may soLve the
proÈlem¶
BUt if yoU stilL get ranÂom shUtÕ
downs and constaNtLy changing BÁTE
codes on tºe ES±, ÖLLow the troUb×
lesºooting ÃrocedUres in Task
l
of ÍØ
55´¶520²237²23²3·
SEP
´9
37
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