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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SELECTED VERTICAL
SELECTED SELECTOR ALTITUDE
AUTOPILOT LEFT, CENTER, RIGHT ENGAGE SWITCH
ALTITUDE SPEED DISPLAY
COMMAND ENGAGE (CMD) SWITCH/LIGHT
CAPTAIN'SFLIGHT
FIRST
DIRECTOR
OFFICER'S
ON/OFFSWITCH FLIGHTDIRECTORON/OFFSWITCH ALTITUDE HOLD VERTICAL SPEED
VERTICAL SPEED MODE SELECT SWITCH/LIGHT
MODE SELECT
SELECT KNOB
SWITCH/LIGHT SELECT SWITCH/LIGHT
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MAINTENANCE MANUAL
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(+1,500 FT/MIN)
1 . ALTITUDE SELECT DISPLAY MANUALLY 3 . V/S SWITCH PUSHED FOR V/S ENGSET FOR ATC CLEARANCE OF 15,000 FT- ALT HOLD DOT-BAR EXTINGUISHES. V/S SWITCH PUSHED FOR V/S ENG- V/S DOT-BAR ILLUMINATES
V/S DOT-BAR ILLUMINATES -- VERT SPD DISPLAY INDICATES 0
. VERT SPD DISPLAY SET FOR +1,500 FT/MIN . VERT SPD DISPLAY FOR +1500 FT/MIN
A/P CLIMBS TO POINT 2 IN V/S MODE -- A/P CLIMBS TO POINT 4 IN V/S MODE
2 . ALT HOLD SWITCH PUSHED (AT 10,000 FT) 4 . VERT SPD DISPLAY SET TO 0 AT SELECTED POINT
V/S DOT-BAR EXTINGUISHES
-- A/P LEVELS & HOLDS BAROMETRIC ALTITUDE
V/S DISPLAY BLANKS
-- UNDER ALT HOLD LOGIC CONTROL
ALT HOLD DOT-BAR ILLUMINATES -- V/S MODE ARMED
A/P LEVELS TO BAROMETRIC ALTITUDE AT TIME -- FMA ON EADI IN PITCH MODE ENGAGED
0F ALT HOLD SELECTEDSECTION INDICATES V/S
AFDS UNDER ALT HOLD LOGIC CONTROL
-
FMA ON EADI IN PITCH MODE ENGAGED
-
GUN 001-050,052-999
GUN 051
SECTION INDICATES ALT HOLD
Pitch Channel - Altitude Select/Hold Mode
Figure 12
5 . VERT SPD DISPLAY SET FOR +1500 FT/MIN
V/S MODE ENGAGED
-
V/S DOT-BAR ILLUMINATES
-
A/P CLIMBS TO POINT 6 IN V/S MODE -
6 . CRITERIA SATISFIED FOR ALT CAPTURE
V/S DOT-BAR EXTINGUISHES -
HOLD DOT-BAR ILLUMINATES
-
FMA ON EADI INDICATES ALT CAP UNTIL <10 FT
-FROM SELECTED ALT, THEN INDICATES ALT HOLD
A/P LEVELS OFF TO 15,000 FT -
AFDS UNDER ALT SELECT LOGIC CONTROL -
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MAINTENANCE MANUAL
(q) Pitch Altitude Select Mode
1) Altitude select arm and altitude select engage are not manually selectable on the MCP. Altitude select occurs at altitude capture, which is determined by capture criteria, and may be entered from any of the following modes: V/S, FLCH, VNAV, T/O (in F/D only), and GA. Altitude select may not be entered from the G/S mode.
(11) Altitude Select/Hold Control Logic (Fig. 10)
(a)
Flare Engage Logic
1) Flare engage logic is generated by computation of the appropriate data from the data management bus.
(b)
Vertical Position Approach Logic
1) The vertical position approach logic is generated from flare engage or glideslope engage. This logic is required for switching between flare engage/glideslope engage circuitry and ALT HOLD/SELECT circuitry.
(c)
Vertical Position Engage Logic
1) Vertical position engage logic is generated by either flare engage, glideslope engage, altitude select engage and altitude hold engage and generates vertical position engage. Whenever a vertical position mode change occurs, vertical position engage is momentarily interrupted. The vertical position engage logic is required for switching from a synchronization mode to active flare engage, glideslope engage, altitude select engage, and altitude hold engage mode in the vertical position command processor.
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