COMAC ARJ21-700 - Page 186

ARJ21-SVV19-13120-00
RampServicingOperation
Instruction
ZoneLocation
130STA218-STA560.722FwdCargoCompartment,Middle
EquipmentCompartment
AccessPanels
NumberName
135ALWWaterServiceDoor
3.Procedures
A.Procedure
(1)Conrmtheaircraftstatuswiththesitemaintenanceoperatorbeforellthewaterandcanlling
thewater.
(2)OpenWaterServiceDoor135ALW.
(3)Connectthettingofthepotablewaterservicevehicletothewaterllingnippleatthewater
systemservicepanel.
(4)Selecttherequiredwaterquantityonthewatersysteminterfacepanel.
(5)Openthevalveofthepotablewatervehicleandstartaddingwater.
NOTE:
Makesurethellingwaterpressureis20psig-45psig.
NOTE:
Theentirewatertankllingtimefromemptytofullisnomorethan1minundernormal
conditions.
(6)Whentheamountofwaterincreasestothesetvalue,thewatersysteminterfacepanellightsup
thecorrespondingindicator.
NOTE:
Whentheindicatorlightison,thewatersysteminterfacepanelwillturnoffthewater
llingautomatically.
(7)Shutffthevalveofthepotablewatervehicleandturnoffthewaterlling.
NOTE:
Ifthewatersupplyisnotshutoffintime,waterowsoverboardthroughthefuselage
drainunit.
(8)TurntheselectorswitchonthepotablewatersysteminterfacepaneltotheFLIGHTREADY
position.
(9)Followthesestepstodisconnectthewatersupplyhose:
(a)Disconnectthewatersupplyhosefromthewaterllingnipple.
(b)Letallwaterdrainfromthewatersupplyhose.
(10)CloseWaterServiceDoor135ALW.
B.FinalProcedure
(1)Makesurethattheworkareaisclean.Removealltools,equipmentandunwantedmaterials
fromtheworkarea.
ARJ21-A-13-12-22-01A-216A-A
Issue001,2023-01-29
Page2of3
Applicableto:ALL