 +_____________________________________________________________________
  AUTHOR:                                          SMS: B27026      
     J. KIEL             BFS PROGRAM NOTE          DR:  108564      
 ____________________                             __________________
  ORG/PHONE:          OPS NOTE (X)  USER NOTE ( )  DATE:            
 RI/D (310)922-3742        RELEASE NOTE ( )             03/25/93    
 ___________________________________________________________________
  OI/FLIGHT EFFECTIVITY:          USER AFFECTED:                     
      OI-22 & SUBS                CREW (X)  GROUND (X)  DUMP ONLY ( )
 ____________________________________________________________________
            MAJOR SOFTWARE AREA:             OPS MODES AFFECTED:     
 BSL( ) BSS( ) GNC( ) SEQ(X) SM/SP( ) IPL( )          1              
 _____________________________________________________________________
  SOFTWARE SUB-AREA:  SEQ                                             
 _____________________________________________________________________
  PRINCIPAL FUNCTIONS:  MG038120/3.3.1.15.3 DETAIL REQUIREMENTS       
 _____________________________________________________________________
  TITLE:                                                              
           BFS ENGAGEMENT IN MM101                                    
 _____________________________________________________________________
  DESCRIPTION:                                                        
                                                                      
    WHEN A BFS ENGAGE TRANSITION OCCURS IN MAJOR MODE 101 PRIOR TO    
    EVENT AS11A_NAV_START (PLATFORM RELEASE), THE BFS SOFTWARE ENTERS 
    A CONTINUOUS RESTART LOOP WHICH LOCKS UP THE BFS GPC.  A BIG 'X'  
    ON THE BFS DISPLAYS WOULD BE EVIDENCE OF THIS CONDITION.          
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
 _____________________________________________________________________
  USER RESPONSE:                                                      
                                                                      
    THE USER SHOULD BE AWARE THAT A BFS ENGAGE TRANSITION IN MAJOR    
    MODE 101 PRIOR TO EVENT AS11A_NAV_START (PLATFORM RELEASE) WILL   
    RESULT IN THE BFS CONTROLLED DISPLAYS SHOWING A BIG 'X'. THE      
    STANDARD PROCEDURE FOR SAFING THE VEHICLE AFTER AN ACCIDENTAL     
    BFS ENGAGE IN MAJOR MODE 101 IS TO POWER OFF ALL 5 GPC'S, RE-IPL  
    A PASS GPC, AND TRANSITION TO G9.                                 
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
 _____________________________________________________________________
 CONCURRENCE:                           APPROVAL:                    
 RI: <S> J. AGRES          DATE 04/28/93                             
     --------------------      ---------                             
 FDSD:   W. R. PRUETT      DATE 05/05/93                             
      -------------------      --------- DARRELL E. STAMPER 05/07/93 
 PF MGR:   KENNY TODD      DATE 05/06/93------------------- -------- 
        -----------------      --------- CHAIRMAN, SASCB      DATE   
 _____________________________________________________________________
 @


