 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B22519      ]
 ]   R. LOHMANN       ]    BFS PROGRAM NOTE         ] DR:  101921      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 7-14-88    ]
 ]   RI/DNY  X-3742   ]      RELEASE NOTE ( )       ] REV:  10-20-89   ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]   OI8A AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC( ) SEQ(X) SM/SP( ) IPL( )]        1, 3, 6          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: SEQ                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS:     MG038120/3.3.1.11.3                        ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]   VENT DOOR BFS ENGAGE CONCERN                                      ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]   A FAILURE OF PFS IMMEDIATELY PRIOR TO OR DURING A VENT DOOR OPEN/ ]
 ] CLOSE OPERATION MAY RESULT IN THE OPERATION NOT BEING PERFORMED.    ]
 ] IF BFS IS NOT ENGAGED WITHIN 17 SECONDS OF A SCHEDULED AUTOMATIC    ]
 ] OPERATION, THE COMMANDS WILL NOT BE ISSUED AND THE VENT DOORS WILL  ]
 ] REMAIN IN THE CONFIGURATION THAT PFS LEFT THEM IN AT THE TIME OF    ]
 ] FAILURE.                                                            ]
 ]                                                                     ]
 ] NOTE : THE VENT DOORS WILL OPEN AUTOMATICALLY IN MM 603 UPON BFS    ]
 ]        ENGAGEMENT AFTER GROUND RELATIVE VELOCITY <= 2400 FPS AND    ]
 ]        BEFORE ROLLOUT. (CR 89826)                                   ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ]   THE USER SHOULD BE AWARE THAT IF PFS FAILS IMMEDIATELY PRIOR TO   ]
 ] OR DURING AN AUTOMATIC VENT DOOR OPEN/CLOSE OPERATION, THE BFS MUST ]
 ] BE ENGAGED WITHIN 17 SECONDS TO INSURE PROPER VENT DOOR OPERATION.  ]
 ] (NOTE : IN MM 305, CREW CAN MANUALLY OPEN VENT DOORS VIA ITEM ENTRY ]
 ] IF BFS IS ENGAGED AFTER THE 17 SECOND TIMER EXPIRES.)               ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> C. PURTELL        DATE 10/25/89]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 11/09/89]                             ]
 ]    --------------------      ---------] M.C. GREMILLION    11/15/89 ]
 ]PF MGR:JAMES JANNEY       DATE 11/13/89]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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