 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:  B07339A    ]
 ] S. RAHMANI         ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/DNY X5195       ]      RELEASE NOTE ( )       ] 09/01/81         ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  11.24 AND SUBS               ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )] 6                       ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: GUIDANCE, ABORT, DISPLAY                         ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038104/3.2.3.3.10                            ]
 ]_____________________________________________________________________]
 ] TITLE:  ALPHA-RECOVERY/NZ-HOLD TRANSITION                           ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]  IN MAJOR MODE 602, A TRANSITION FROM ALPHA-RECOVERY                ]
 ]  SUBPHASE TO NZ-HOLD SUBPHASE REQUIRES EITHER ONE OF THE            ]
 ]  FOLLOWING CONDITIONS TO BE SATISFIED:                              ]
 ]  (A) NZ > 1.8G                                                      ]
 ]  (B) ALPHA > 45 DEGREES  IN A GUIDANCE CYCLE AND                    ]
 ]      ALPHA < 45 DEGREES IN A SUBSEQUENT CYCLE                       ]
 ]  CASE (A) IS THE ONE WHICH USUALLY TAKES PLACE.  FURTHERMORE, THE   ]
 ]  QUANTITY DISPLAYED AS THE SECOND COMPONENT OF ADI_ERROR_NEEDLES    ]
 ]  IS EQUAL TO THE ERROR IN ALPHA AND THE ERROR RELATED TO NZ FOR     ]
 ]  ALPHA-RECOVERY AND NZ_HOLD SUBPHASES, RESPECTIVELY.                ]
 ]  CONSEQUENTLY, IF CONDITION (B) IS UNEXPECTEDLY MET, THE CREW MAY   ]
 ]  NOT BE ABLE TO NULL THE PITCH ERROR NEEDLE BECAUSE WHAT THEY       ]
 ]  THINK THEY SEE (ALPHA ERROR) IS NOT WHAT IS ACTUALLY DISPLAYED     ]
 ]  (NZ ERROR).  THE SITUATION GETS WORSE IF THE CREW CONTINUES TO     ]
 ]  INCREASE ALPHA TO NULL THE ERROR, I.E., ERROR INCREASES.           ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]  THE NECESSARY INFORMATION IS AVAILABLE ON VERT.  SITUATION         ]
 ]  DISPLAY 1.  AN OVERBRIGHT NZ IS DISPLAYED ON THE TRANSITION        ]
 ]  FROM ALPHA-RECOVERY TO NZ-HOLD PHASE.  USER SHOULD BE AWARE        ]
 ]  THAT CASE (B) CAN HAPPEN UNEXPECTEDLY.  USER SHOULD IGNORE         ]
 ]  THE ERROR NEEDLES IF CASE (B) HAPPENS.                             ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI:<S>A. TROY             DATE 09/16/81]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 7/28/88 ]                             ]
 ] --------------------         ---------] RW MOOREHEAD        7/30/88 ]
 ]PF MGR: B. NOTEBOOM       DATE 7/29/88 ]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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