PS Magazine - TB 43-PS-456
PS, The Preventative Maintenance Monthly
ISSUE 456
NOVEMBER 1990
Rotor Systems .
..
Clean cobra rotor blades with dry ±heese ±Loth,
NSN
8305-00²267³3015, ´ike
it says in Para 5-32 of TM 55³1520µ236³23¶1.
Remove stubborn deposits With a ±loth dampened with P³D¶680 dry±leaning
solvent. But don't get solvent on the blade erosion boot· Use only ±leaning ±om¸
pound,
NSN
6850³01-184³3182, on
the boot.
Apply air±raft grease,
NSN
9¹50-
00º478º0055, to the root Ftting bolt
hole, drag bra±e bolt Hole an» exposed
unpainted su¼½±es.
Clean ¾uey blades With a mild soap and Water solution, liKe it says in Para
5³34.¹ of TM 55¿1520-2À0³23-À. cleaniNg ±ompound,
NSN
6850-0¹¶¹84³3¹82,
Will do Fne·
±-"²³´µ¶·¸¹º»:¼
ÁHe apply ±orrosion preventivE ±om¸
pound,
NSN
6850³ÃÃ-142-9582,
or
primer ±oating,
NSN
8ÃÀ0³Ãó835¶2Ä4.
Prote±t the blade's main bolt bushing,
»rag bra±e retention bolt hole bushing
and any exposÅ» bare metalÆliKe grip
and drag padsÆWith a ligHt ±oating of
cPc,
NSN
803óÃó23¹-2353.
NOV90
Then ±oat tHe blade pin so±Kets witH
cPc,
NSN
8Ã30³Ã0³23À-2345, liKe it
says in Appendix Ǻ5 of TM 55-À52ÿ
237¿23³6 and ÈasK ¹³4É2.4 of TM 55Ê
À520º237³23³ÀË
Remove the lubri±ant Ìom tHe blade
pin so±Kets beÍre installing tHe blades.
½
¾
CH¿47
Îipe the surfa±e of ea±h chinooK
blade with a ±leaning ±lotH,
NSN
8305-
00-753-2967, soaKed in a solution of
water and soap,
NSN
8520³0ó228-
0598. Then Wipe oÏ the soapy solution
with a ±lean Ðloth,
NSN
83Ã5³00-753³
2967, soaKed in ±lean WaterÑ Dry the
blade WitH another dry ±loth.
Remove stubboÒ deposits witH a
±lean ±loth dampened witH dry±leaning
solvent, liKe it says iÓ TaSK 5Ô63 of
ÈM 55-À520-2ÕÃ-23Ö4.
nOV90
39
ÀeMovE ÁTubboÂÃ
dEpoÁitÁ wITh
dÄcleaÃiÃg ÁolvEÃT
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