 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B27656      ]
 ] A. LELANUJA        ]    BFS PROGRAM NOTE         ] DR: 106206       ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 6/11/91    ]
 ] RI-D/(213)922-0258 ]      RELEASE NOTE ( )       ] REV A: 8/05/91   ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] OI-20 AND SUBS.               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS( ) GNC(X) SEQ( ) SM/SP( ) IPL( )]  MM305 AND MM603        ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: HIP                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038106/3.2.5.5.1.5 NOSEWHEEL COMMAND HIP     ]
 ]_____________________________________________________________________]
 ] TITLE:  NO BACKUP NOSEWHEEL STEERING SYSTEMS DURING ROLLOUT         ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ]     WHEN UPGRADED NWS HARDWARE IS BEING USED; FOR A FAILURE OF      ]
 ] NWS1 ON ROLLOUT WHICH CAUSES THE NWS SYSTEM TO DOWNMODE TO FREE     ]
 ] CASTER, THE NWS SYSTEM MAY NOT BE SUCCESSFULLY RECOVERED AFTER      ]
 ] SELECTING THE ALTERNATE NWS2 CHANNEL.  IMMEDIATE DOWNMODING (IN     ]
 ] 240 MSEC.) IS LIKELY TO OCCUR IF A LARGE RUDDER PEDAL COMMAND IS    ]
 ] PRESENT AT THE TIME THE NWS2 MODE IS SELECTED.                      ]
 ]                                                                     ]
 ]     NOTE: THIS CAN ALSO HAPPEN IF NWS2 FAILS AND THE MODE IS        ]
 ]           CHANGED TO NWS1 DURING ROLLOUT.                           ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] IF A NWS1 CHANNEL FAILURE OCCURS DURING ROLLOUT (POST NOSE GEAR     ]
 ] TOUCHDOWN), THE USER CANNOT RELY ON NWS2 FOR PROVIDING A BACKUP     ]
 ] COMPUTER MODE OF NWS.  UPON SELECTING NWS2, THE NWS SYSTEM MAY      ]
 ] IMMEDIATELY (240 MSEC.) AND UNNOTICEABLY DOWNMODE TO FREE CASTER,   ]
 ] AND THE USER WILL HAVE TO USE DIFFERENTIAL BRAKING TO MAINTAIN      ]
 ] VEHICLE DIRECTIONAL CONTROL.                                        ]
 ]                                                                     ]
 ] IF A NWS1 CHANNEL FAILURE OCCURS PRIOR TO NOSE GEAR TOUCHDOWN,      ]
 ] THE USER SHOULD SELECT NWS2 IN ORDER TO REGAIN THE ALTERNATE        ]
 ] COMPUTER MODE OF NWS.                                               ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> A. TROY           DATE 08/08/91]                             ]
 ]    --------------------      ---------]                             ]
 ]FDSD:   W. R. PRUETT      DATE 09/10/91]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 09/18/91 ]
 ]PF MGR:  KENNY TODD       DATE 09/18/91]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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