 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B28681      ]
 ] R.J. CMELAK        ]    BFS PROGRAM NOTE         ] DR:  108673      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 06/09/93   ]
 ] (562) 922-5246     ]      RELEASE NOTE ( )       ] REV A 11/19/97   ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  OI-26B & SUBS                ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS(X) GNC( ) SEQ( ) SM/SP( ) IPL( )]       0,1,3,6           ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: BOS                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038101/3.1.7                                 ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]         BFS GPC HARDWARE FAULT SIGNATURES                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] A HARDWARE FAULTED MIA TRANSMITTER FAIL-ON TO A FC OR DK BUS WILL   ]
 ] CAUSE A GPC ERROR CODE 43 'MIA TRANSMITTER FAIL' AND AN I/O ERROR   ]
 ] 22 'BCE OUT OF BOUNDS' TO BE LOGGED ALONG WITH OTHER SIGNATURE      ]
 ] CHARACTERISTICS IF BFS IS NOT IN COMMAND OF THAT BUS.  A MIA TRANS- ]
 ] MITTER FAIL-ON TO A BFS COMMANDED BUS WILL GO UNDETECTED.  OTHER    ]
 ] HARDWARE FAULTS (BCE JUMP OUT OF BOUNDS) HAVE BEEN POSTULATED THAT  ]
 ] HAVE THE SAME SIGNATURES BUT MAY OR MAY NOT HAVE ADDITIONAL         ]
 ] DIFFERENTIATING SIGNATURE CHARACTERISTICS.  THE EXCEPTION IS THAT   ]
 ] A BCE JUMP OUT OF BOUNDS ON A DK BUS CAN ALSO RESULT IN AN I/O      ]
 ] ERROR 4F 'DEU POLL' INSTEAD OF THE SIGNATURE DESCRIBED ABOVE.       ]
 ]                                                                     ]
 ]                                                                     ]
 ]                          (CONTINUED)                                ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ]  IF A GPC ERROR CODE 43 OCCURS ON A PASS COMMANDED DK BUS THEN THE  ]
 ]  GROUND SHOULD CHECK THE TRANSMITTER STATUS BIT FOR FAIL-ON. IF     ]
 ]  SET, BFS SHOULD BE REASSIGNED TO THAT DK BUS TO PROTECT AGAINST    ]
 ]  THE MIA TRANSMITTER FAIL-ON.  IF NOT SET THEN DK LISTEN IS LOST.   ]
 ]                                                                     ]
 ]  IF A GPC ERROR CODE 43 OCCURS ON A BFS COMMANDED DK BUS THEN THE   ]
 ]  FAULT IS NOT A MIA FAIL-ON.  THE BUS SHOULD BE REASSIGNED TO PASS. ]
 ]  THE RESULT WILL BE A SET OF FINAL MESSAGES (FROM THE LISTEN CODE)  ]
 ]  AND A LOSS OF BFS DK LISTEN CAPABILITY.           (CONTINUED)      ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]BNA:<S> C. CORBIN         DATE 12/04/97]                             ]
 ]    --------------------      ---------]                             ]
 ]ASD:   ERIC C. BINGHAM    DATE 02/24/98]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 02/24/98 ]
 ]PF MGR:  M. C. KERR       DATE 02/23/98]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
 @



 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] SMS: B28681      ]
 ] R.J. CMELAK        ]    BFS PROGRAM NOTE         ] DR:  108673      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 06/09/93   ]
 ] BNA (562) 922-5246 ]      RELEASE NOTE ( )       ] REV A 11/19/97   ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]                                                                     ]
 ]         BFS GPC HARDWARE FAULT SIGNATURES                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IF THE BCE JUMP OUT OF BOUNDS WERE TO OCCUR ON A DK BUS COMMANDED   ]
 ] BY BFS WITH THE FAULT 'DK XMTR 1(2,3,4)' THEN THE FAULT WILL BE     ]
 ] REINTRODUCED EVERY 3 CYCLES (2.88 SEC.), HOWEVER THE FAULT MESSAGE  ]
 ] WILL BE FILTERED AT 5 CYCLES RESULTING IN 2.88 AND 5.76 SECOND      ]
 ] MESSAGE INTERVALS.                                                  ]
 ]                                                                     ]
 ]                                                                     ]
 ] THE USER WOULD SEE THE FOLLOWING SIGNATURES.                        ]
 ]                                                                     ]
 ] FOR A DK BUS:   'DK XMTR 1(2,3,4)' FAULT MESSAGE                    ]
 ]                  GPC ERROR CODE 43, MIA TRANSMITTER FAIL            ]
 ]                  I/O ERROR 22, 'BCE OUT OF BOUNDS'                  ]
 ]                  POSSIBLE TRANSMITTER BIT TOGGLE, IF BFS COMMANDED  ]
 ]                  BCE DISABLED, IF BFS LISTEN                        ]
 ]                                                                     ]
 ]          (OR)    I/O ERROR 4F, 'DEU POLL'                           ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                          (CONTINUED)                                ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ] (CONTINUED)                                                         ]
 ]                                                                     ]
 ] IF AN I/O ERROR 4F 'DEU POLL' OCCURS ON A DK BUS COMMANDED BY BFS   ]
 ] THEN THE BUS SHOULD BE REASSIGNED TO PASS.  A LOSS OF DK LISTEN     ]
 ] CAPABILITY WILL RESULT.                                             ]
 ]                                                                     ]
 ] IF AN I/O ERROR 4F 'DEU POLL' OCCURS ON A DK BUS COMMANDED BY PASS  ]
 ] NO ACTION SHOULD BE TAKEN.  A LOSS OF DK LISTEN WILL RESULT.        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                            (CONTINUED)                              ]
 ]_____________________________________________________________________]
 @


 +_____________________________________________________________________
 ]                                                                     ]
 ]                       SUPPLEMENTAL SHEET                            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] AUTHOR:            ]                             ] SMS: B28681      ]
 ] R.J. CMELAK        ]    BFS PROGRAM NOTE         ] DR:  108673      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  06/09/93  ]
 ] BNA (562) 922-5246 ]      RELEASE NOTE ( )       ] REV A  11/19/97  ]
 ]____________________]_____________________________]__________________]
 ] TITLE:                                                              ]
 ]                                                                     ]
 ]         BFS GPC HARDWARE FAULT SIGNATURES                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ] FOR A FC BUS:   'BCE STRING 1(2,3,4) PASS' FAULT MESSAGE            ]
 ] LISTEN MODE      GPC ERROR CODE 43, 'MIA TRANSMITTER FAIL'          ]
 ]                  GPC ERROR CODE 44, 'STRING DOWNMODE                ]
 ]                  I/O ERROR 22, 'BCE OUT OF BOUNDS'                  ]
 ]                  LOSS OF IMU MID-VALUE SELECT (IF STRING 1,2,OR 3), ]
 ]                  AN I/O RESET OR BFS ENGAGEMENT WITH THE TRANSMITTER]
 ]                  STATUS BIT NOT SET WILL REINTRODUCE THE FAULT      ]
 ]                                                                     ]
 ]                                                                     ]
 ] FOR A FC BUS:   'I/O ERROR FF1(2,3,4)' FAULT MESSAGE (OR)           ]
 ] ENGAGE MODE     'I/O ERROR FA1(2,3,4)' FAULT MESSAGE                ]
 ]                  GPC ERROR CODE 43, 'MIA TRANSMITTER FAIL'          ]
 ]                  I/O ERROR 22, 'BCE OUT OF BOUNDS'                  ]
 ]                  MIA TRANSMITTER TURNED OFF, IF NOT FAIL-ON         ]
 ]                  BCE DISABLED                                       ]
 ]                  AN I/O RESET WILL REINTRODUCE THE FAULT            ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ] (CONTINUED)                                                         ]
 ]                                                                     ]
 ] FC LISTEN MODE:                                                     ]
 ]                                                                     ]
 ]    IF A GPC ERROR CODE 43 OCCURS NO ACTION CAN BE TAKEN; THE STRING ]
 ]    IS LOST.                                                         ]
 ]                                                                     ]
 ]                                                                     ]
 ] FC ENGAGE MODE:                                                     ]
 ]                                                                     ]
 ]    IF A GPC ERROR CODE 43 OCCURS NO ACTION CAN BE TAKEN; THE BUS IS ]
 ]    DISABLED.                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 @
