 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] E. WARE            ]    PASS PROGRAM NOTE        ]        109671    ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  05/15/96  ]
 ] SSOAS/713-282-7425 ]      RELEASE NOTE( )        ] REV A: 06/06/96  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-25 AND SUBS                ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G1                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: ASCENT, FCS                                      ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.176, 4.165                                   ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]            NO FIRST STAGE SERC WHEN 3 SSMES FAIL                    ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] SINGLE ENGINE ROLL CONTROL (SERC) WILL NOT BE AUTOMATICALLY         ]
 ] ESTABLISHED FOR THE FOLLOWING FIRST STAGE (MM102) THREE MAIN ENGINE ]
 ] FAILURE SCENARIOS:                                                  ]
 ]                                                                     ]
 ] SCENARIO A.  SIMULTANEOUS DEPRESSION OF ALL THREE SSME SHUTDOWN     ]
 ]              PUSHBUTTONS.                                           ]
 ]                                                                     ]
 ] SCENARIO B.  SIMULTANEOUS DEPRESSION OF THE SECOND AND THIRD SSME   ]
 ]              SHUTDOWN PUSHBUTTONS WHEN THE LAST TWO MAIN ENGINES    ]
 ]              FAIL SUBSEQUENT TO A PREVIOUS MAIN ENGINE FAILURE/     ]
 ]              SHUTDOWN.                                              ]
 ]                                                                     ]
 ] SCENARIO C.  ALL THREE MAIN ENGINES FAIL SIMULTANEOUSLY WITH        ]
 ]              SHUTDOWN LIMITS ENABLED.                               ]
 ]                                                                     ]
 ] SCENARIO D.  SUBSEQUENT TO A PREVIOUS MAIN ENGINE FAILURE, THE      ]
 ]              LAST TWO MAIN ENGINES FAIL SIMULTANEOUSLY WITH         ]
 ]              SHUTDOWN LIMITS ENABLED.                               ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] USER CAN ENABLE SINGLE ENGINE ROLL CONTROL BY EXECUTING             ]
 ] ITEM 6 (SERC) ON ASCENT TRAJ DISPLAY.                               ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]SSOAS:  JEAN L. ZOPHY     DATE 07/10/96]                             ]
 ]      ------------------      ---------]                             ]
 ]ASD:   ERIC C. BINGHAM    DATE 07/10/96]                             ]
 ]    --------------------      ---------] DARRELL E. STAMPER 07/15/96 ]
 ]PF MGR:   DON PREVETT     DATE 07/11/96]------------------- -------- ]
 ]       JOHN W. CRAFT, JR.      07/12/96] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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