 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] P. DRISKELL        ]    PASS PROGRAM NOTE        ]       110209     ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] SSOAS/335-2206     ]      RELEASE NOTE( )        ]       09/09/96   ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-24 THRU OI-26B             ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:  G6         ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )]                                 ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  DISP                                            ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS:  5.7                                           ]
 ]_____________________________________________________________________]
 ] TITLE:  GPC ERRORS DUE TO DIVIDE-BY-ZERO IN SPEC 50 DIP DURING      ]
 ]         MM601                                                       ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] IF THE HORIZONTAL SITUATION (SPEC 50) DISPLAY IS UP DURING MM601,   ]
 ] AND THE ALTITUDE IS LESS THAN OR EQUAL TO THE I-LOAD HS_ALT, WHILE  ]
 ] THE BODY ROLL ANGLE (PHI) IS GREATER THAN 1E-8, THEN A DIVIDE-BY-   ]
 ] ZERO GPC ERROR WILL BE GENERATED AT A RATE OF 1.04HZ.               ]
 ] WHILE THE ERROR EXISTS, THE PREDICTORS WILL APPEAR ON THE NOSE OF   ]
 ] THE SHUTTLE SYMBOL ON SPEC 50.                                      ]
 ] THE ERROR WILL APPEAR IN THE DOWNLISTED GPC ERROR LOG.              ]
 ] THE GPC ERROR GROUP IS 3, AND THE CODE IS 12 WITH A PDE FOR FSW     ]
 ] MODULE GEGASC.  THE SOFTWARE ERROR RESPONSE WILL BE TO IGNORE THE   ]
 ] ERROR (EFFECTIVE DIVISION BY 1) AND CONTINUE PROCESSING.            ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] THE FOLLOWING WORKAROUNDS CAN BE PERFORMED:                         ]
 ] 1) TAKE SPEC 50 DOWN.                                               ]
 ]    (IF ALTITUDE INCREASES ABOVE I-LOAD HS_ALT, THEN ERROR WILL      ]
 ]    CEASE.)                                                          ]
 ] 2) IF NOT NECESSARY, DO NOT CALL-UP SPEC 50 IN MM601 IF ALT_WHEELS  ]
 ]    (V95H0165C) IS LESS THAN OR EQUAL TO THE I-LOAD HS_ALT           ]
 ]    (V97U6816C).  THE VALUE I-LOADED FOR PAST FLIGHTS (OI23 - OI25)  ]
 ]    HAS BEEN 200,000 FEET.                                           ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]SSOAS:  JOHN MAGLEY       DATE 10/15/96]                             ]
 ]      ------------------      ---------]                             ]
 ]ASD:  ERIC C. BINGHAM     DATE 10/15/96]                             ]
 ]    --------------------      ---------] DARRELL E. STAMPER 10/16/96 ]
 ]PF MGR: J'ANN H. SIDERS   DATE 10/16/96]------------------- -------- ]
 ]           H.R.                10/15/96] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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