 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B07142A     ]
 ] C.H. PURTELL       ]    BFS PROGRAM NOTE         ]                  ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] RI/DNY-FA36  X2183 ]      RELEASE NOTE ( )       ] 03/25/81         ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]   9.08 AND SUBS               ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )] 1                       ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: DAP, SSME, ACTUATORS, DOWNLIST                   ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038106/3.2.5.5                               ]
 ]_____________________________________________________________________]
 ] TITLE: SSME DUMP AND STOW COMMANDS                                  ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]WHEN  BFS  IS  ENGAGED,  COMMANDS  FROM  ASCENT   DAP  ARE           ]
 ]PROCESSED  BY THE MPS_TVC_CMD_HIP TO SSME  ACTUATORS PRIOR           ]
 ]TO SSME ZERO THRUST.  SUBSEQUENT TO ZERO TRUST AND L02/LH2           ]
 ]PREVALVE   CLOSURE,   THE   ET_SEP   SEQUENCE   ISSUES   A           ]
 ]MPS_DUMP_POS FLAG.  THE HIP MONITORS THIS FLAG AND WHEN IT           ]
 ]IS  SET,  ISSUES  SSME  I_LOAD  PITCH/YAW   DUMP  POSITION           ]
 ]COMMANDS.    SUBSEQUENT  ISSUES  AS43_TERM_MPS_DUMP_N_STOW           ]
 ]_SSMES.    THEREFORE,   SUBSEQUENT  TO  ZERO  THRUST,  THE           ]
 ]DOWNLISTED  COMMANDS FROM  ASC_DAP ARE  NOT  EQUIVALENT TO           ]
 ]DUMP OR STOW COMMANDS INITIATED FROM THE HIP.                        ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ]THE  USER  SHOULD  BE AWARE  THAT  DOWNLISTED  ASC_DAP_TVC           ]
 ]COMMANDS SUBSEQUENT  TO SSME ZERO THRUST ARE  NOT UPDATED.           ]
 ]DUMP OR  STOW COMMANDS ARE INITIATED FROM  THE MPS_TVC_CMD           ]
 ]_HIP  AND ARE  REFLECTED BY DOWNLINKED  ACTUATOR POSITIONS           ]
 ](V58H1100A, 1150A, 1200A, 1250A, 1300A, AND 1350A).                  ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI:<S>A. TROY             DATE 03/25/81]                             ]
 ] --------------------         ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 08/02/88]                             ]
 ] --------------------         ---------] JACK G BOYKIN      08/17/88 ]
 ]PF MGR: J VERNON          DATE 07/29/88]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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