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                           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
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 EC NUMBER         :  ECC72347     DATE             : 91-09-05
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 91/05
                                                                                
 PURPOSE:                                                                       
 THIS ECA IS RELEASED FOR JAPAN USE ONLY                                        
 TO PREVENT READ ERROR OF 20MB HDD ASSEMBLY P/N6128220.                         

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

 Plant 97                                                       

 5530- B/M0005530 SEE PHYSICAL CHECK       B/M79F5408 01.0 01.0 
  G08                                                           
  G18                                                           
  H08                                                           

 CHECK PART NUMBER AND LOT NUMBER OF 20MB HDD ASSEMBLY.                         
 FOLLOWING FIXED DISK IS AFFECTED.                                              
                                                                                
      P/N  : 6128220                                                            
      LOT# : XK,XL,XM,XN                                                        
             (X IS ANY ALPHABET)                                                
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL:                                                                        
 REPLACE 20MB HDD P/N6128220 WITH NEW P/N95F4084.                               
                                                                                
 ATTENTION!!                                                                    
 RETURN THE REMOVED PART WITH THE COMPLETION REPORT AS SOON AS                  
 POSSIBLE.                                                                      
                                                                                
 NOTES:                                                                         
 THIS FBM IS AVAILABLE FOR TWO YEARS AND USED ON MODEL 5541-M08/                
 P08 TOO.                                                                       
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