PS Magazine - TB 43-PS-428
PS, The Preventative Maintenance Monthly
ISSUE 428
JULY 1988
UH-60A. ±²
The Word on Engine Cleaning
Cleaning your Black Hawk's T-70±
engine every I 0± fight hours is recom²
mended, but it's Not a hard and Fst re²
quirement.
CeRtain operating conditions let you
exteNd ³e inte´aL. µike i¶ you have a
limited wateR supply or i· ambient tem²
peratures are below 5°¸
O¹her conditions calL ·ºR more »e-
OR i· you 're operating iN a salt water
or desert enviro¼ent.
PAra I½131B o· TM 55½284¾½¿48½¿3
spelÀs out ¹he conditions under which
yoU caN adjust the cleaning interVaL.
Task 3 o· TM Á5Â1Á2¾½¿37½¿3Ã4 is
quent cLeaning. µike i· you get oiL or hy-
being changed to agree with Äe engine
draulic fuid in the engine iÅlet.
manuaL requirements.
,.± I w²f³@! L´®µ
¶·¸¹º-»¼½c:
¾
A
t¿"1ÀÁÂ'R
P:"ho³ne´µ ¶
_±
AUTOVON 693-2066
(24 HOURS)
.±
Ii your un²t has not rece²ved a message you have an ²nterest ³n,
check w²th your next h²gher headquarters´
F/-BBµ01¶
SOF, Technical± Cer-
tain fixed wIng aiRcRa²t± ³nspectIon
of engIne oIl fiLteRs on te´edyne conµ
tinental engInes, 031800Z MaR 88.
CH-47-BB-03·
SO¶± ·echnica´, CH¸
47¹± ³nspection of heateR fue´ LIne
and e´ectrica´ components for chaf-
ing± 042300Z Mar 88º
CH-47-BB-04¶
SOF, OperatIona´±
C»¼47± C´earing of red
¸X¹¹
pRoce½
duRes± ¾601
OOZ
MaR 88¿
Aº-64-BB»06¶
SO¶, ·echnica´± AH¼
64A± Àevision to inspectIon of strap
assemb´y ÁaIn Rotor (stRap pack),
042300Z MaR 88Â
AH-64-8B-07·
SOF± Main! Mandatory,
AH¼64A, Àestaking access door
hingesà 09¾800Z Mar 88¿
CH-47-BB¼05½
SO¶, OperatIonaL±
Àevision to C»Ä47¹ engine transmisÅ
sIon clutch fai´uRe to engage pRoce½
duRes± ¾721
OOZ
Mar
bb¾
UH-60-BB-02¶
SOF, MaIn! MandatoRy±
U»Ä60NEHÆ60A± Çnspection of taÈl
RotoR geaRbox out shaft, ¾72200Z MaR
bb¿
CH-47-BB-06À
SOF± Technical± CH¼
47C, ÇnspectIon of bearings in aft swIvÉ
e´ing seÊvo actuatoRs± 21Ë900Z MaR
88 .
Cº-47-BB-07¶
SO¶Ì ·echnica´ CHÆ
47¹± Ínspection of engine cRoss shaft±
222300Z MaR 88Î
ÁH-5BÂBB¼02·
SO¶, Technica´± OHÄ
58NC/D± ÇnspectIon of aiRcra²Ï with
Landing search ´Ight, 24¾800Z MaR 88Ð
ÁHÃ6-88-02¶
SO¶, ÑechnIca´,
HÄ6
serIes± Çnspection of RigId connectIng
lInks, 242000Z MaR 88¿
ÁH-6-BBÄ03¶
SOF, ·echnica´± O»¼ÒA±
ÇnspectIon of main rotor hub stRap
pack assemb´y, 281900Z MaR 88Ó
UH-60-88-MÅM-0ƶ
ÔHÕBÖA± Optional
reÁovaL of the uppeR cabIn a²Ï vIbra-
tion absorbeR± ¾421
OOZ
Mar 88Ð
uH-1 aNd A·¸1 ENgiN¹s º»¼
à WÄenÅhing Problem
Æotice a Loss in engine power?
CouLd be a broken connector rod. Check Çhe ÆI on the T53 engine.
È· the ÆI is RÉnning about 8 percent above normal, and Äe EGT and torque are
OK, ³e connectoR rod on ³e variabLe inlet guide vane assembly is pRobably
brokeN.
The vanes won't open Ênd the ÆI wilL run above noËaL.
Ìny time you instaÍÀ oR
"
.²
ÇÈÉ
I³:
adjust ³e connector rod,
use 2 wreNchesÎoNe to
loosen oR tighten the jam nut
and ¹he other to keep a
backup Ïrce oN ³Ð sel·²
aligNing bearing.
È· you don't put a backup
Ïrce on ¹he bearing, Çhe
jam Nut will
twist
and
weÑken ³e coNnector roD.
Maybe not right away, but it
wilÀ sooNeR oR lateR and ³e
rod wilL break.
So doN't take chances.
Grab two wrenches next
time you iNstaÍÀ or adjust ¹he
connector assembLy.
J½L88
´7
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