COMAC ARJ21-700 - Page 150

ARJ21-SVV19-13120-00
RampServicingOperation
Instruction
(h)Lubricateallbearingsandjointsinthecleanedarea(excludinglubricationpointswith
greasenipples).
(4)Removeunwantedhydraulicuid.
(a)Cleantheunwantedhydraulicuidwithrags.
CAUTION:DONOTUSEWATERORCLEANERSTHATCONTAINFLAMMABLESOL-
VENTSTOCLEANWARMCOMPONENTS.WARMCOMPONENTSCAN
CAUSETHEFLAMMABLESOLVENTSTOBURN.
(b)SelectCleaningAgentofAirplaneHydraulicFluid(11-008)tocleanthehydraulicuidfrom
warmcomponents.
(5)Cleanacousticpanelsurfacesofenginethrustreverser.
(a)Specialattentionmustbepaidtopreventwaterandcleanerfromenteringthehoneycomb
structureoftheacousticpanel.Followthestepsbelowtominimizetheingestionofcleaner
andwaterintothehoneycombstructureoftheacousticpanel.
CAUTION:MAKESURETHATWATERANDCLEANERTRAPPEDINSIDETHE
ACOUSTICPANELAREREMOVED.OTHERWISE,THEYCANCAUSE
CORROSIONOFTHEHONEYCOMBSANDWICHSTRUCTURE.
1)Wipetheareathatyouwillcleanwithacleancloth,damp,butnotsaturated,with
cleaner.
2)Removealltheresidueswithcleanclothmoistenedwithwater.
3)Wipeusingacleandryclothtoremoveallmoisture.
(b)UseonlycleanersthatmeettherequirementsofstepA.(11)whencleaningtheacoustic
panels.
CAUTION:DONOTSUBJECTAREASCONTAININGPERFORATEDSKINSTO
HIGH-PRESSURESPRAYING,ORSUBMERGEINSOLVENTSORWATER.
OTHERWISE,DAMAGETOEQUIPMENTMAYOCCUR.
(c)Ifpressurewashingisrequiredforareasaroundacousticpanels,theacousticportionof
theenginenacellemustbecoveredtopreventingestionofthecleaner.
C.Puttheaircraftbacktoitsusualcondition
WARNING:1、 、
、
PITOT/STATICPRESSUREPROBECOVERSMUSTBEVISIBLEFROMTHE
GROUNDANDAWARNINGNOTICEINSTALLEDONTHELEFTCONTROLWHEEL.
2、 、
、
PITOT/STATICPRESSUREPROBECOVERSMUSTBEREMOVEDBEFORE
FLIGHT.OTHERWISE,MAYLEADTOLOSSOFSAFEFLIGHT .
CAUTION:WHENEVERANOPENINGISCOVERED,MAKESURETHATTHECOVERISVISI-
BLEFROMTHEGROUND.ENGINESSHOULDNOTBEOPERATEDWITHCOVERS
INPLACEBECAUSETHECOVERSCANCOMEOFFANDDAMAGETHEENGINES.
CAUTION:MAKESURETHECOVERISINGOODWORKINGCONDITIONWITHNOEVIDENCE
OFDAMAGE,ESPECIALLYFRAYINGAROUNDTHECOVEROPENING.FRAYED
FIBERSFROMTHECOVERCOMBINEDWITHOTHERSUBSTANCES(SUCHAS
SAND,GREASE,ETC.)CANCAUSEOBSTRUCTIONINTHEPROBE.
CAUTION:COUNTTHENUMBEROFPINSONTHEPROTECTIVECOVERDURINGINSTALLA-
TIONANDREMOVAL.MAKESURETHATTHEPINSAREWELLCONNECTEDWITH
THEPROTECTIVECOVER.SEPARATIONOFPINSMAYCAUSEDAMAGETOTHE
ENGINEORTHEAIRPLANE.
ARJ21-A-13-12-15-01A-250A-A
Issue001,2023-01-29
Page10of11
Applicableto:ALL