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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         :  ECC63965     DATE             : 90-08-30
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 90/07

 PURPOSE:                                                                       
 THIS ECA IS RELEASED FOR JAPAN USE ONLY                                        
 TO PREVENT POST 162 ERROR CAUSED BY DROPPING OUT HEAD PAD OF
 R/W HEAD-1 IN 3.5"FDD(P/N 94X1527).
                                                                                

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

 Plant 97                                                       

 5571 B/M0005571 9700001 THRU 9715000      B/M79F1056 00.4 00.4 
  S0A B/M0005571 9710001 THRU 9713590      B/M79F1056 00.4 00.4 
  T0A B/M0005571 9730001 THRU 9733182      B/M79F1056 00.4 00.4 
  T0B B/M0005571 9750001 THRU 9750790      B/M79F1056 00.4 00.4 
  T0C                                                           

                                                                                
 PHYSICAL CHECK:                                                                
 CHECK PART NUMBER OF 3.5"FDD IN 5571-S/T SYSTEM UNIT.                          
 IF 3.5"FDD IS P/N 94X1527, REPLACE IT WITH P/N 38F7835 PROVIDED                
 BY THIS FBM.                                                                   
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL: INSTALL FBM# 79F1056
                                                                                
 NOTES:  THIS FBM IS AVAILABLE FOR ONE YEAR.
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