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Section VII

Systems

VII-22-7

Malfunction Protection

The flight control system uses a multi-layered response to failures
which may occurs within the system and data from external sensors.
Malfunction protection and response are provided by a dual channel
main processor (Level II verified) and I/O processor (Level I verified)
architecture. The main processor provides protection against flight
guidance data failures and single channel attitude control failures. The
I/O processor provides additional limiters and monitors including
protection from possible generic software design errors in the main
processor program.

10 Sep 2006

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Summary of Contents for G150

Page 1: ...er Module 2 One FGP 3000 Flight Guidance Panel 1 SVO 85C Primary Servo 2 SMT 86C Servo Mount 2 SVO 85B Primary Servo 1 SMT 86B Servo Mount 1 FGS MODES Flight Guidance Mode Selection The primary means of selecting and deselecting flight guidance modes is by pressing the appropriate button on the FGP pressing an FGP button when the mode is not selected will select the mode A subsequent press of the ...

Page 2: ... greater than 30 at mode activation the system generates commands to hold the roll angle at 30 Heading Select Mode HDG When in heading select mode the system generates commands to capture and maintain the selected heading shown on the PFD and or MFD The selected heading is set by the HDG knob on the FGP Heading mode is selected by pressing the HDG switch on the FGP Modes Activated by Control Funct...

Page 3: ...s selected by pressing the B C button on the FGP when a localizer is tuned When in back course mode the system generates commands to capture and track the back course approach localizer Go Around Mode Lateral Go around mode is selected by pressing the GA button When in lateral go around mode the system generates commands in the lateral axis to hold the heading existing when the GA button is presse...

Page 4: ... When in pitch hold mode the VS pitch wheel down up is used to change the pitch reference Continued Modes Activated by Control Functions Pitch Hold Basic Pitch Hold Altitude Hold ALT Altitude Hold Pressure Altitude Altitude Preselect Altitude Preselect Baro Altitude Vertical Speed VS Vertical Speed fpm Flight Level Change FLC IAS Mach Approach APPR FMS Glideslope Vertical Navigation VNAV FMS Go Ar...

Page 5: ... capture track and flight level change overspeed modes When in vertical speed mode the system generates commands to maintain the vertical speed that exists when the mode is selected In vertical speed mode the VS Pitch wheel is used to slew the vertical speed reference Flight Level Change Mode FLC Flight level change mode is selected by pressing the FLC button on the FGP except when in vertical app...

Page 6: ...MS can automatically select the FGS vertical mode if required The FGS generates commands to follow the pitch command signal from the FMS when coupled VNAV guidance is active in PATH and VGP modes The pilot can manually change any of the FCS mode selections made by the FMS Pilot action suspends the current FMS VNAV control of the FGS but does not preclude automatic reassertion of control by the FMS...

Page 7: ...d response are provided by a dual channel main processor Level II verified and I O processor Level I verified architecture The main processor provides protection against flight guidance data failures and single channel attitude control failures The I O processor provides additional limiters and monitors including protection from possible generic software design errors in the main processor program...

Page 8: ... These limiters limit the aircraft response to those approaching normal maneuvering 5 second of roll rate in the lateral axis and 0 2g in the vertical axis Aircraft response to failures which result in main processor servo commands exceeding the maximum rate limit are limited by the I O processor cutout function and servo torque limiting If the aircraft exceeds predetermined attitudes attitude rat...

Page 9: ... commands are displayed on both PFD s with two exceptions In approach or go around modes left flight director commands are displayed on the left PFD and right flight director commands are displayed on the right PFD The autopilot if engaged is always coupled to the selected flight director The selected flight director commands are sent to the attitude loops in both computers where identical computa...

Page 10: ... 50 000 ft Normally each click of this switch changes the preselected altitude by 1000 foot increments The switch has a second position that is achieved by pulling the knob away from the panel The increment size is changed to 100 ft per click In either position the full range 1000 to 50 000 is available Movement of the switch automatically arms altitude select except when in approach mode HDG knob...

Page 11: ...gagement is possible FD button 2 Selects and removes the steering commands on the PFD At power up the steering commands are displayed on the PFD Steering commands are selected on both PFD s by engaging the autopilot selection of go around mode automatic selection of overspeed mode or by manual selection of a vertical or lateral mode when steering commands are not displayed on either PFD and the au...

Page 12: ...hbutton controls which flight guidance commands drive the flight director command bars In approach and go around modes the flight directors operate independently The following buttons are momentary buttons used to select deselect modes Unless the active mode is approach selection of a lateral or vertical mode respectively automatically deselects any other lateral or vertical mode Unless the active...

Page 13: ...h capture track or by onside FMS navigation capture track NAV button Selects deselects the navigation mode In NAV mode the autopilot uses the active navigation source selected on the display control panel DCP APPR button Selects deselects approach mode B C button Selects deselects back course mode There is no automatic selection of back course mode ALT button Selects deselects altitude hold mode V...

Page 14: ...than the current altitude the climb submode is entered If the preselected altitude is lower than the current altitude the descend submode is entered In either case a minimum vertical speed is implemented which forces the aircraft toward the selected altitude with a certain minimum vertical speed VS button Selects deselects vertical speed mode There are two additional autopilot switches external to...

Page 15: ...Section VII Systems VII 22 15 Figure 7 22 1 FGP 3000 Flight Control Panel 10 Sep 2006 ...

Page 16: ...Section VII Systems VII 22 16 Figure 7 22 2 Autopilot Controls 10 Sep 2006 ...

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