 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS:B27731       ]
 ]   LINDA IVERS      ]    BFS PROGRAM NOTE         ] DR:108569        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 6/18/93    ]
 ] RID/922-4858       ]      RELEASE NOTE ( )       ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]            OI22 & SUBS        ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED: 1   ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )]                         ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: GUID                                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038104 / 3.2.3.1.10.3.1.2                    ]
 ]_____________________________________________________________________]
 ] TITLE: BFS TAL THROTTLE DIFFERENCES                                 ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION: IN A THREE ENGINE SYSTEMS TAL DECLARED AFTER THE THREE ]
 ] ENGINE LATE TAL THROTTLE DOWN I-LOAD, BFS WILL PERFORM 3-G ACCEL-   ]
 ] ERATION LIMITING PREMATURELY. PRE- ENGAGE, THIS RESULTS IN A HIGHER ]
 ] THROTTLE COMMAND THAN PASS IS CURRENTLY COMMANDING AND AN EARLIER   ]
 ] COMMANDED MECO TIME. THESE DIFFERENCES WILL BECOME VISIBLE ON THE   ]
 ] ASCENT 2 TRAJ DISPLAY WHEN THE ACTUAL VEHICLE ACCELERATION IS       ]
 ] APPROXIMATELY 2 G'S. FOR BFS ENGAGED, THE CREW WILL EXPERIENCE THE  ]
 ] INCREASE IN THROTTLE BEGINNING AROUND 2 G'S. THE MECO TARGETS WILL  ]
 ] BE ACHEIVED.                                                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE: USER SHOULD BE AWARE OF THE COMMANDED THROTTLE AND   ]
 ] MECO TIME DIFFERENCES SEEN ON THE ASCENT TRAJ 2 DISPLAY FOR BFS IN  ]
 ] LISTEN MODE. FOR BFS ENGAGED, THE CREW SHOULD BE AWARE THAT         ]
 ] MECO WAS COMMANDED EARLY AND THAT THE BFS WILL COMPLETE THE OMS     ]
 ] DUMP POST-MECO IF NECESSARY TO MEET LANDING WEIGHT AND CG LIMITS.   ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> J. AGRES          DATE 06/25/93]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 07/14/93]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 07/14/93 ]
 ]PF MGR:JOHN W. CRAFT, JR. DATE 07/14/93]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
 @



