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 ] AUTHOR:            ]                             ] DR:              ]
 ]  N. PARKER         ]    PASS PROGRAM NOTE        ]       107022     ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE (X)  USER NOTE ( ) ] DATE:  03/18/92  ]
 ] IBM/(713)282-8429  ]      RELEASE NOTE( )        ] REV A: 04/16/92  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  OI-22                        ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED: OPS 9       ]
 ]SSW ( )  GNC (X)  VU (X)  SM/PL ( )]                                 ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  IMU                                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS:  V4.11                                         ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]        DESELECTED IMU MAY BE FAILED OUT OF LIMITS                   ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]                       AT THE END OF THE MEASUREMENT CYCLE (STEP 3C) ]
 ]  IN GYRO-COMPASS MAINTENANCE (GC_ALIGN1) A DESELECTED IMU MAY BE    ]
 ]  ERRONEOUSLY CHECKED FOR MISALIGNMENT AND FAILED AS "OUT OF LIMITS".]
 ]  THE FAIL IS DRIVEN TO THE IMU GROUND CONTROL MONITOR DISPLAY       ]
 ]  (SPEC 104, GYRO COMP-ITEM 24). ALSO FAIL_AC IS DOWNLISTED IN OPS 9.]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]                                                                     ]
 ]    IF AN IMU IS DESELECTED DURING A GYRO-COMPASS ALIGNMENT SUBMODE  ]
 ]  THEN THE NORMAL PROCEDURE IS TO RE-RUN THE GYRO-COMPASS ALIGNMENT  ]
 ]  FOR ALL THREE IMUS. THIS PROCEDURE INVOLVES TAKING ALL THREE IMUS  ]
 ]  TO TERM IDLE FIRST(ITEM 27 ON SPEC 104), RE-SELECTING THE IMUS ON  ]
 ]  SPEC 104(ITEMS 16, 17 AND 18), DOING AN ATTITUDE DETERMINATION     ]
 ]  (ITEM 19 ON SPEC 104), RE-SELECTING THE IMUS ON SPEC 104 (ITEMS    ]
 ]  16, 17, AND 18) AND ENTERING THE GYRO-COMPASS ALIGNMENT (ITEM 24   ]
 ]  ON SPEC 104).                                                      ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: PATTI A. THORNTON    DATE 06/09/92]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 06/10/92]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 06/19/92 ]
 ]PF MGR:   OANH N. PHAM    DATE 06/19/92]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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