 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:  B06109     ]
 ] R. LOHMANN         ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  06/23/83  ]
 ] RI/DNY   X-1921    ]      RELEASE NOTE ( )       ] REV B: 02/09/96  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]     OI-22 AND SUBS            ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ(X) SM/SP( ) IPL( )] 1,3,6                   ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: ABORT, OPS, TRANSITION, ASCENT, DISPLAY, KEYBOARD]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038120/3.3.1.15                              ]
 ]_____________________________________________________________________]
 ] TITLE:  ASCENT MAJOR MODE TRANSITIONS                               ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]1. THERE ARE DIFFERENCES BETWEEN PASS AND BFS WITH REGARD TO         ]
 ]   WHICH LANDING SITE IS SELECTED FOR ABORTS.                        ]
 ]                                                                     ]
 ]   FOR BOTH PASS AND BFS, IF A TAL ABORT IS DECLARED IN MM103 OR     ]
 ]   MM104 AND THEN PRO'ED TO OPS 3 FROM EITHER MM104 OR MM105 THE     ]
 ]   LANDING SITE SELECTED WOULD BE THE TAL SITE.                      ]
 ]                                                                     ]
 ]   IF A TAL ABORT IS NOT SELECTED BUT AN OPS TRANSITION IS INITIATED ]
 ]   TO OPS 3 THE FOLLOWING TABLE LISTS THE LANDING SITE DIFFERENCES.  ]
 ]                                                                     ]
 ]       INITIAL CREW PRO                LANDING SITE SELECTED         ]
 ]                                                                     ]
 ]   PASS MM104   >    MM301             AREA SELECTED = 1             ]
 ]   BFS  MM104   >    MM301             AREA SELECTED = TAL SITE      ]
 ]   PASS MM105   >    MM301             AREA SELECTED = 1             ]
 ]   BFS  MM105   >    MM301             AREA SELECTED = 1             ]
 ]                                                                     ]
 ]2. IF IN MM102 AN RTLS IS REQUESTED, EITHER BY THE ABORT ROTARY      ]
 ]   SWITCH OR A CREW PRO FROM MM102 TO MM601, AND BFS NEVER SEES      ]
 ]   SRB SEP PRE-ENGAGED (DUE TO FAILURES), BFS APPLICATION CODE WILL  ]
 ]   NOT MODE TO MM601. IN SUCH A SCENARIO, IF THE CREW MAKES A        ]
 ]   SECOND ATTEMPT TO PRO BFS INTO MM601, THE CREW WILL SEE THE BFS   ]
 ]   MM601 DISPLAY ON THEIR CRT BUT THE BFS WILL ACTUALLY BE RUNNING   ]
 ]   MM102 SOFTWARE AND THE GROUND WILL SEE BFS STILL IN MM102.        ]
 ] ___________________________________________________________________ ]
 ]USER RESPONSE:                                                       ]
 ]1. IF AN AOA ABORT IS DECLARED, PRO TO MM105 BEFORE GOING TO OPS 301.]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> G. ALBRIGHT       DATE 02/28/96]                             ]
 ]   ---------------------      ---------]                             ]
 ]ASD:  ERIC C. BINGHAM     DATE 03/26/96]                             ]
 ]    --------------------      ---------] DARRELL E. STAMPER 03/28/96 ]
 ]PF MGR: JOHN P. RUPPERT   DATE 03/28/96]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
 @

 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] SMS:  B06109     ]
 ] R. LOHMANN         ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  06/28/80  ]
 ] RI/DNY    X-1921   ]      RELEASE NOTE ( )       ] REV B: 02/09/96  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:  ASCENT MAJOR MODE TRANSITIONS                               ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE(CONT.):                                                ]
 ]                                                                     ]
 ]   IF A PRO TO OPS 301 IS DONE IN MM104 AND NOT MM105, THE LANDING   ]
 ]   SITE SELECTED WOULD BE THE TAL SITE. IF DESIRED, THE CREW COULD   ]
 ]   SELECT A DIFFERENT LANDING SITE BY USING THE HORIZONTAL           ]
 ]   SITUATION DISPLAY.                                                ]
 ]                                                                     ]
 ]2. IF AN RTLS IS DECLARED VERIFY THAT THE BFS HAS TRANSITIONED       ]
 ]   TO MM103 (CREW PRO FROM MM102 MAY BE REQUIRED) BEFORE GOING TO    ]
 ]   MM601.                                                            ]
 ]                                                                     ]
 ]   BFS SHOULD BE MONITORED DURING MAJOR MODE TRANSITIONS TO          ]
 ]   ENSURE IT HAS TRANSITIONED ALONG WITH THE PASS SYSTEM.            ]
 ]   IF IT DOES NOT TRANSITION, CREW ACTION IS MANUALLY NEEDED         ]
 ]   TO TRANSITION THE BFS TO THE CORRECT MAJOR MODE.                  ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 @
