COMAC ARJ21-700 - Page 210

ARJ21-SVV19-13120-00
RampServicingOperation
Instruction
(8)MakesurethattheONindicatorlightontheEXTPWRpushbuttonisON.
(9)MakesurethatthethreeAVAILindicatorlightsisOFF .
(a)MakesurethattheAVAILindicatorlightontheexternalpowerreceptacleboardisOFF
andtheINUSEindicatorlightisON.
(b)MakesurethattheAVAILindicatorlightontheELECPWRcontrolpanelincockpitisON.
(c)MakesurethattheAVAILindicatorlightonthegroundservicepowercontrolpanelincock-
pitisOFF
(10)Checktheexternalpower.
(a)ObservetheELECTRICALsynopticpageonMFDtomakesurethatthepowersupply
statusofexternalpowerisnormalandrelatedcircuitsofEXTPWRaregreen.
(b)MakesurethatEICASdoesnotshowexternalpowersystemalertmessage.
NOTE:
DuringthetransferbetweentheAPUpowersupplyandtheexternalpowersup-
ply,alertmessagessuchasIPCMISCONFIG,FLTCTRLNODISPATCHappear
temporarily.
B.Finalprocedure
(1)Makesurethattheworkareaisclean.Removealltools,equipmentandunwantedmaterials
fromtheworkarea.
ARJ21-A-13-12-27-01A-761A-A
Issue001,2023-01-29
Page2of5
Applicableto:ALL