1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] R.L. DOBSON        ]    PASS PROGRAM NOTE        ]     100765       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  12/01/87  ]
 ] IBM/282-7330       ]      RELEASE NOTE( )        ] REV C: 06/25/93  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-8A AND SUBS                ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G1, G6                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: SSME                                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.181, 4.222                                   ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]        SSME STATUS LIGHTS TEMPORARILY OFF                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]  SSME RED STATUS LIGHTS TEMPORARILY OFF,AMBER LIGHTS TEMPORARILY ON ]
 ]                                                                     ]
 ]  DURING THE 3 PASS SSME POST-SHUTDOWN VERIFICATION, THE SHUTDOWN    ]
 ]  PHASE FLAG IS RESET.  THIS MAY RESULT IN THE FOLLOWING EVENTS      ]
 ]  VISIBLE TO THE USER:                                               ]
 ]                                                                     ]
 ]  1)  THE RED SSME STATUS LIGHTS SHOULD BE ON WHEN AN ENGINE IS IN   ]
 ]  SHUTDOWN OR POST-SHUTDOWN PHASE.  DURING THE TRANSITION FROM       ]
 ]  SHUTDOWN TO POST-SHUTDOWN PHASE, THE LIGHTS MAY TEMPORARILY GO OFF ]
 ]  FOR 160 MSEC.  THEY WILL THEN BE ON UNTIL TURNED OFF AT ETSEP.     ]
 ]                                                                     ]
 ]  2)  THE SSME SOP WILL BEGIN TO REISSUE ONE OR MORE SETS OF SHUTDOWN]
 ]  ENABLE AND SHUTDOWN COMMANDS TO THE SSME CONTROLLER.  IF THE GPC   ]
 ]  READS A STALE DATA FRAME DURING POST-SHUTDOWN PHASE VERIFICATION,  ]
 ]  THE GPC MAY ISSUE AN INCOMPLETE PAIR OF SHUTDOWN ENABLE/SHUTDOWN   ]
 ]  COMMANDS.  FOR OI-8B ONLY, THIS WILL PRECLUDE THE SSME SOP FROM    ]
 ]  ISSUING ANY SUBSEQUENT COMMANDS TO THE SSME CONTROLLER.            ]
 ]                                                                     ]
 ]  3) FOR OI8C AND SUBSEQUENT OI'S, IF THE FIRST COMMAND SENT OUT     ]
 ]  DURING THE 3 PASS SSME POST-SHUTDOWN VERIFICATION PERIOD IS A      ]
 ]  SHUTDOWN COMMAND, THEN FOR ONE HFE PASS THE SSME SOP MAY           ]
 ]  ANNUNCIATE A COMMAND PATH FAILURE.  THIS HAPPENS WHEN THE SHUTDOWN ]
 ]  COMMAND IS PRECEDED BY SOME COMMAND (FOR EXAMPLE, A THROTTLE       ]
 ]  COMMAND) OTHER THAN A SHUTDOWN ENABLE COMMAND.  THIS MAY CAUSE THE ]
 ]  AMBER SSME STATUS LIGHT TO TEMPORARILY GO ON FOR 160 MSEC OR A     ]
 ]  MESSAGE TO BE ANNUNCIATED ON THE FAULT SUMMARY DISPLAY.  THE       ]
 ]  MESSAGE WILL READ "MPS CMD C", "MPS CMD L", OR "MPS CMD R" FOR     ]
 ]  ENGINES 1, 2, 3, RESPECTIVELY.  THE COMMAND PATH FAILURE WILL BE   ]
 ]  TURNED OFF ON THE NEXT HFE PASS WHEN A SUBSEQUENT SHUTDOWN ENABLE  ]
 ]  COMMAND IS ISSUED AND ACCEPTED BY THE EIU.                         ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
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1+_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ] R.L. DOBSON        ]    PASS PROGRAM NOTE        ]      100765      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  12/01/87  ]
 ] IBM/282-7330       ]      RELEASE NOTE ( )       ] REV C: 06/25/93  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]         SSME STATUS LIGHTS TEMPORARILY OFF                          ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]  1)  BE AWARE OF THE POSSIBILITY THAT THE SSME STATUS LIGHTS WILL   ]
 ]  TEMPORARILY GO OFF AT THE BEGINNING OF POST-SHUTDOWN PHASE.        ]
 ]                                                                     ]
 ]  2)  FOR OI-8B ONLY, IN OPS 1/6, THE FSW MAY NOT COMMAND A LOX DUMP ]
 ]  THROUGH THE MOV WHEN A GPC READS A STALE DATA FRAME FROM THAT      ]
 ]  SSME, DURING THE POST-SHUTDOWN PHASE VERIFICATION.                 ]
 ]                                                                     ]
 ]  3)  FOR OI-8C AND SUBSEQUENT OI'S, BE AWARE OF THE POSSIBILITY     ]
 ]  THAT THE SSME AMBER STATUS LIGHTS MAY TEMPORARILY GO ON, AND A     ]
 ]  FAULT SUMMARY DISPLAY MESSAGE MAY BE GENERATED, AT THE BEGINNING   ]
 ]  OF THE POST-SHUTDOWN PHASE.                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM:  HUGH D. STOVALL     DATE 08/31/93]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 09/02/93]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 09/14/93 ]
 ]PF MGR:   DAVE RIGBY      DATE 09/14/93]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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