 +_____________________________________________________________________
  AUTHOR:                                          SMS: B20062      
   K. M. GJEVRE          BFS PROGRAM NOTE          DR:  108550      
 ____________________                             __________________
  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE: 01/07/93   
  RID/(310) 922-3747       RELEASE NOTE ( )                         
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  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
     OI-22                        CREW (X)  GROUND ( )  DUMP ONLY ( )
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            MAJOR SOFTWARE AREA:             OPS MODES AFFECTED:     
 BSL( ) BSS(X) GNC( ) SEQ( ) SM/SP( ) IPL( )     MM 104              
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  SOFTWARE SUB-AREA:  DISP                                            
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  PRINCIPAL FUNCTIONS:  STS 83-0020/4.2.10                            
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  TITLE:                                                              
          ILLEGAL TIG COULD RESULT IN BAD BFS OMS 1 TARGETS           
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  DESCRIPTION:                                                        
                                                                      
  IF ET SEP IS INHIBITED ACROSS THE TRANSITION TO MM104 (17-INCH      
  DISCONNECT FAILURE), THE CALCULATED TIG WILL BE INCORRECT.  AN      
  "ILLEGAL TIG" MESSAGE WILL BE ANNUNCIATED.  ALSO, THE BFS WILL      
  BLANK THE PEG 4 TARGET DATA ON THE MANEUVER DISPLAY.  IF THE PEG 4  
  TARGET DATA IS NOT ENTERED, ZEROS WILL BE INCORRECTLY USED IN THE   
  GUIDANCE CALCULATIONS FOR THE OMS 1 TARGET SOLUTION.                
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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  USER RESPONSE:                                                      
                                                                      
  THE PEG 4 TARGET DATA AS WELL AS THE TIG MUST BE ENTERED ON THE     
  BFS MANEUVER DISPLAY BEFORE EXECUTING THE LOAD COMMAND.             
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
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 CONCURRENCE:                           APPROVAL:                    
 RI: <S> J. AGRES          DATE 02/11/93                             
     --------------------      ---------                             
 FDSD:   W. R. PRUETT      DATE 02/23/93                             
      -------------------      --------- DARRELL E. STAMPER 03/05/93 
 PF MGR:MICHAEL P. DEMASIE DATE 03/05/93------------------- -------- 
        ------------------     --------- CHAIRMAN, SASCB      DATE   
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