---------------------------------------------------------------------
                           IBM ECA
              Engineering Change Announcement

Parts removed from this machine and returned to IBM must be genuine,
                      unaltered IBM Parts

         IBM World Trade Corporation, CE Department Germany
---------------------------------------------------------------------
 EC NUMBER         :  EC341783     DATE             : 88-12-08
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 88/10

 ABSTRACT:  EC 341783   FBM 23F3352
                                                                                
 PURPOSE:                                                                       
 THIS ECA IS RELEASED FOR WORLD TRADE USE ONLY                                  
 TO FIX POST "162/163" ERROR ON 5551 S/T MODELS                                 
                                                                                

 Type            Machines Affected                              
 Mod. With       and/or Feature/Device     B/M to be  Serv Syst 
 Stg. B/M        Description               Installed  Hour Hour 

 Plant 97                                                       

 5551                                                           
 S09  B/MBASIC   9702477 THRU 9704090      B/M23F3352 00.5 00.5 
 T09  B/MBASIC   9732290 THRU 9734090      B/M23F3352 00.5 00.5 
 T0A  B/MBASIC   9762664 THRU 9763855      B/M23F3352 00.5 00.5 
 T0B  B/MBASIC   9790835 THRU 9791246      B/M23F3352 00.5 00.5 

                                                                                
 PHYSICAL CHECK:                                                                
 CHECK EC NUMBER ON POWER UNIT.                                                 
 IF EC NUMBER ON POWER UNIT IS EC A27713A,                                      
 REPLACE IT WITH EC A27713B                                                     
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL:  INSTALL FBM 23F3352
---------------------------------------------------------------------