 +_____________________________________________________________________
  AUTHOR:                                          SMS:  B20063     
    DAN PROSEK           BFS PROGRAM NOTE          DR:   108576     
 ____________________                             __________________
  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:  5/28/93   
   RID/(310)922-3701       RELEASE NOTE ( )        REV B  7/22/93   
 ___________________________________________________________________
  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
    OI-21/22/23/24                CREW (X)  GROUND ( )  DUMP ONLY ( )
 ____________________________________________________________________
            MAJOR SOFTWARE AREA:             OPS MODES AFFECTED:     
 BSL( ) BSS(X) GNC( ) SEQ( ) SM/SP( ) IPL( )     OPS 1 & OPS 3       
 _____________________________________________________________________
  SOFTWARE SUB-AREA: DISP                                             
 _____________________________________________________________________
  PRINCIPAL FUNCTIONS: STS83-0020/B.4.112                             
 _____________________________________________________________________
  TITLE: ERRONEOUS MESSAGES ANNUNCIATED AFTER FAILED OPS TRANSITION   
                                                                      
 _____________________________________________________________________
  DESCRIPTION:                                                        
                                                                      
   POST ON-ORBIT IPL, FOLLOWING A FAILED OPS 0 TO OPS 3 TRANSITION    
   (BFS FAILS TO SYNC WITH PASS), A SUBSEQUENT OPS 0 TO 3 TRANSITION  
   (SUCCESSFUL OR FAILED) WILL CAUSE THE FOLLOWING CLASS 2 (DENOTED   
   BY "*") FAULT MESSAGES TO BE ANNUNCIATED:                          
                                                                      
              FCS SAT     POS*                                        
              R RCS       JET*                                        
              L RCS       JET*                                        
              F RCS       JET*                                        
                                                                      
   (CONTINUED ON SUPPLEMENTAL SHEET)                                  
 _____________________________________________________________________
  USER RESPONSE:                                                      
                                                                      
   THE VALIDITY OF EACH MESSAGE ANNUNICATED FROM THE ABOVE SCENARIOS  
   MUST BE VERIFIED UNDER THE FOLLOWING CONDITIONS:                   
                                                                      
   MESSAGE:   FCS SAT      POS*                                       
                                                                      
   CONDITION: AFTER A SUCCESSFUL OPS 0 TO OPS 3 TRANSITION.           
                                                                      
   CHECK THE ELEVON POSITIONS (LOB,LIB,ROB,RIB) AND THEIR STATUS      
   INDICATORS ON THE GNC SYSTEM SUMMARY 1 DISPLAY. IF IN LIMITS       
   THE FAULT MESSAGE IS ERRONEOUS AND SHOULD BE IGNORED.              
                                                                      
   (CONTINUED ON SUPPLEMENTAL SHEET)                                  
 _____________________________________________________________________
 CONCURRENCE:                           APPROVAL:                    
 RI: <S> J. AGRES          DATE 08/10/93                             
     --------------------      ---------                             
 FDSD:   W. R. PRUETT      DATE 09/02/93                             
      -------------------      --------- DARRELL E. STAMPER 11/22/93 
 PF MGR:  D. STEPHENSON    DATE 08/31/93------------------- -------- 
        -----------------      --------- CHAIRMAN, SASCB      DATE   
 _____________________________________________________________________
 @




 +_____________________________________________________________________
                                                                      
                        SUPPLEMENTAL SHEET                            
                                                                      
 _____________________________________________________________________
  AUTHOR:                                          SMS:  B20063     
    DAN PROSEK           BFS PROGRAM NOTE          DR:   108576     
 ____________________                             __________________
  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:  5/28/93   
   RID/(310)922-3701       RELEASE NOTE ( )        REV B  7/22/93   
 ___________________________________________________________________
  TITLE: ERRONEOUS MESSAGES ANNUNCIATED AFTER FAILED OPS TRANSITION   
                                                                      
 _____________________________________________________________________
  DESCRIPTION:                                                        
                                                                      
   FURTHER, FOLLOWING A FAILED OPS 0 TO OPS 1 TRANSITION (BFS FAILS   
   TO SYNC WITH PASS), A SUBSEQUENT OPS 0 TO 1 TRANSITION             
   (SUCCESSFUL OR FAILED) WILL CAUSE THE FOLLOWING CLASS 2 (DENOTED   
   BY "*") FAULT MESSAGES TO BE ANNUNCIATED:                          
                                                                      
              R RCS       JET*                                        
              L RCS       JET*                                        
              F RCS       JET*                                        
                                                                      
 _____________________________________________________________________
  USER RESPONSE:                                                      
                                                                      
   MESSAGE:   R RCS        JET*  L RCS      JET*  F RCS      JET*   
                                                                      
   CONDITION: AFTER A SUCCESSFUL OPS 0 TO OPS 3 TRANSITION FOLLOWING  
              BFS BEING ENGAGED IN OPS 0.                             
                                                                      
   CHECK THE RCS JET FAIL INDICATORS ON THE GNC SYSTEM SUMMARY 2      
   DISPLAY.  IF ALL INDICATORS ARE BLANK THEN THE FAULT MESSAGES      
   ARE ERRONEOUS AND SHOULD BE IGNORED.  NOTE: FAULT MESSAGES         
   ANNUNICATED AFTER A SUCCESSFUL OPS 0 TO OPS 1 TRANSITION ARE       
   ERRONEOUS.                                                         
                                                                      
   ALL ERRONEOUS FAULT MESSAGES SHOULD BE ACKNOWLEDGED BY EITHER      
   USING THE "MESSAGE RESET" KEY OR BY SCROLLING THE MESSAGE LINE     
   USING THE "ACK" KEY.                                               
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
 _____________________________________________________________________
 @
