1+_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ]   D. H. WHITE      ]    PASS PROGRAM NOTE        ]      104411      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE (X)  USER NOTE ( ) ] DATE:  01/15/92  ]
 ]   IBM/282-7826     ]      RELEASE NOTE( )        ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-8F, OI-20, OI-21, OI-22    ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )]   G2, G8                        ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  RM, GAX, DL                                     ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 4.180, 4.110, DL                               ]
 ]_____________________________________________________________________]
 ] TITLE: SWITCH RM FDIR GAX/DOWNLIST ERROR                            ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]       WHEN A THC SWITCH CONTACT IS FAILED OR DESELECTED, FOLLOWED   ]
 ]   BY A 2ND CONTACT FAILURE ON THE SAME THC SWITCH, MULTIPLE         ]
 ]   ANNUNCIATIONS OF THE SAME (THC) MESSAGE OCCUR AND A 2ND CONTACT   ]
 ]   FAILURE IS DOWNLISTED VIA CGRB_SF_ST_GAX$(I:), I = 1, 2 OR 3.     ]
 ]   IN SOME CASES, THIS 2ND FAILURE DOWNLISTED REFERS TO THE ONLY     ]
 ]   GOOD CONTACT.  THIS APPLIES TO ALL THC SWITCH CONTACTS.           ]
 ]       ALSO, WHEN CONTACTS FOR ONORBIT DAP SWITCHES FAIL, FOLLOWED   ]
 ]   BY THC SWITCH CONTACT FAILURES, THE THC FAILURES MAY NEITHER BE   ]
 ]   ANNUNCIATED NOR DOWNLISTED.  THIS APPLIES TO:                     ]
 ]   1. 'AFT DAP A' CONTACT FAILURE FOLLOWED BY 'FWD THC +X' FAILURE.  ]
 ]   2. 'AFT DAP B'                             'FWD THC -X'        .  ]
 ]   3. 'AFT DAP AUTO'                          'FWD THC +Y'        .  ]
 ]   4. 'AFT DAP INRTL'                         'FWD THC -Y'        .  ]
 ]   5. 'FWD DAP LVLH'                          'AFT THC +X'        .  ]
 ]   6. 'FWD DAP FREE'                          'AFT THC -X'        .  ]
 ]       ON-ORBIT DAP SWITCH NAMES ON OI8F ONLY:                       ]
 ]   4. 'AFT DAP MAN'                           'FWD THC -Y'        .  ]
 ]   5. 'FWD DAP PRIM'                          'AFT THC +X'        .  ]
 ]   6. 'FWD DAP VERN'                          'AFT THC -X'        .  ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]    FOLLOWING A 2ND THC CONTACT FAILURE, A DILEMMA CONDITION         ]
 ]  WILL BE ANNUNCIATED AND DOWNLISTED VIA CGRB_SW_DIL$(2:10 TO 15)    ]
 ]  FOR THE FWD THCS AND CGRB_ORB_TRIPLE_FAST_DILEMMA$(11 TO 16)       ]
 ]  FOR THE AFT THCS.                                                  ]
 ]    CORRECT THC STATUS IS AVAILABLE VIA SPEC 25 (RM ORBIT DISPLAY).  ]
 ]                                                                     ]
 ]                - CONTINUED ON SUPPLEMENT PAGE -                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 03/09/92]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:ROBERT N. HINSON     DATE 03/09/92]                             ]
 ]A.4.2, G4.110                 ---------]DARRELL E. STAMPER 03/09/92  ]
 ]PF MGR:JEFFERSON D. POWELL DATE 3/09/92]------------------- -------- ]
 ]4.180  KENNY TODD          DATE 3/09/92] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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1+_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] DR:              ]
 ]   D. H. WHITE      ]    PASS PROGRAM NOTE        ]      104411      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE (X)  USER NOTE ( ) ] DATE:  01/15/92  ]
 ]   IBM/282-7826     ]      RELEASE NOTE( )        ]                  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]        SWITCH RM FDIR GAX/DOWNLIST ERROR                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
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 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]    CORRECT THC AND DAP SWITCH CONTACT FAILURE STATUS IS DOWNLISTED  ]
 ]  IN CGRB_ORB_TRIPLE_SF_STAT$(1 TO 3:), MSIDS V90M2865P, V90M2866P,  ]
 ]  AND V90M2867P, RESPECTIVELY.                                       ]
 ]    BE AWARE OF EXTRA MESSAGE ANNUNCIATIONS AND DOWNLIST FAILURE     ]
 ]  INDICATIONS W.R.T. THE THC'S DURING ORBIT, OR THE LACK OF THEM.    ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
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