DFCS - GROUND OPERATIONS - PITCH MODE - ALT HOLD
General
You can push these mode selector switches on the MCP and activate the modes when the airplane is on the ground:
-ALT HLD
-LVL CHG.
You cannot activate the VNAV mode when on the ground. You can push the V/S mode selector switch on the ground, however, the mode changes to LVL CHG.
ALT HLD and Flight Directors
When you turn on the F/Ds and push the ALT HLD mode selector switch the FMA annunciator shows ALT HOLD and FD. The F/D command does not show because there is no valid roll mode. Push HDG SEL to activate a roll mode. The FMA now also shows HDG SEL and the F/D command shows on the AI. Turn the selected altitude to within 100 feet of the airplanes altitude. The ALT HLD light on the mode selector switch goes out.
ALT HLD and Autopilot
When you engage A/P A in CMD and push the ALT HLD mode selector switch these annunciations show on the FMA:
-ALT HOLD
-CMD
-CWS R.
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
FLIGHT DIRECTOR
ALT HOLD HDG SEL FD
1. TURN ON F/D SWITCH 2. PUSH ALT HLD MODE SELECTOR SWITCH MA F/D OFF ALTITUDE SEL ALT HLD 10 30 10 30 HDG SEL HEADING
3. PUSH THE HDG SEL MODE SELECTOR SWITCH
4. TURN THE SELECTED ALTITUDE TO WITHIN 100 FEET OF THE AIRPLANE ALTITUDE. ALTITUDE ALT ACQ HDG SEL FD
ALT HLD LIGHT GOES OUT SEL ALT HLD
AUTOPILOT
1. ENGAGE A/P A IN CMD A/P ENGAGE CMD A CMD B CWS B CWS A ALTITUDE
SEL
2. PUSH ALT HLD MODE SELECTOR SWITCH DISENGAGE ALT HLD ALT HOLD CMD CWS R
A22-11-00-103.fm
DFCS - GROUND OPERATIONS - PITCH MODE - ALT HOLD
January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
A22-11-00-104.fm
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
DFCS - GROUND OPERATIONS - PITCH MODE - LVL CHG
LVL CHG and Flight Directors
When you turn on the F/Ds and push the LVL CHG mode selector switch the FMA annunciator shows MCP SPD and FD. The F/D command does not show because there is no valid roll mode. Push HDG SEL to activate a roll mode. The FMA now also shows HDG SEL and the F/D command shows on the AI. Turn the selected altitude to within 200 feet of the airplane altitude and see these changes:
-LVL CHG light on the mode selector switch goes out
-FMA changes from MCP SPD to ALT ACQ
-F/D command moves to the top of AI.
LVL CHG and Autopilot
Engage A/P A in CMD and push the LVL CHG mode selector switch. These annunciations show on the FMA:
-MCP SPD
-CMD
-CWS R.
January 2005
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
A22-11-00-104.fm
FLIGHT DIRECTOR
MCP SPD HDG SEL FD
HEADING
V NAV
1. TURN ON THE F/D MA
SWITCH F/D
10
30
OFF
2. PUSH THE LVL CHG
30
10
MODE SELECTOR
HDG SEL
LVL CHG
SWITCH
3. PUSH THE HDG SEL
MODE SELECTOR
SWITCH
V NAV ALTITUDE
ALT ACQ FDHDG SEL
SEL
4. TURN THE SELECTED
LVL CHG ALT HLD
ALTITUDE TO WITHIN 200 FEET
OF THE AIRPLANE ALTITUDE.
AUTOPILOT
A/P ENGAGE
V NAV CMD A CMD B
1. ENGAGE A/P A IN CMD
CWS A CWS B
2. PUSH LVL CHG
MCP SPD
CMD
MODE SELECTOR
DISENGAGE LVL CHG
CWS R
SWITCH
DFCS - GROUND OPERATIONS -PITCH MODE - LVL CHG 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-700 AVIONCS BITE HANDBOOK 航电自测设备手册 2(10)
