1) Make sure that the display on the yaw damper coupler shows a CAS qpot between -6.5v and -8.5v.
(v)
Push the down arrow key on the keypad.
1) Make sure that the display on the yaw damper coupler shows N1 eng 1 0.00 to 0.10.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10-62253 YAW DAMPER ú
22-12-01
COUPLER ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 512Jul 12/00
A 737-300/400/500MAINTENANCE MANUAL
(w)
Use the engine 1 function generator to apply 3.0 |0.5v ac at 1086 |130 Hz. 1) Use the multimeter to make sure that the applied voltage is
correct. 2) Make sure that the display on the yaw damper coupler shows N1 eng 1 0.42 |0.08.
(x)
Decrease the engine 1 function generator to approximately 0.0v.
1) Make sure that the display on the yaw damper coupler shows N1 eng 1 0.00 to 0.10.
(y)
Push the down arrow key on the keypad.
1) Make sure that the display on the yaw damper coupler shows N1 eng 2 0.00 to 0.10.
(z)
Use the engine 2 function generator to apply 3.0 |0.5v ac at 1086 |130 Hz. 1) Use the multimeter to make sure that the applied voltage is
correct. 2) Make sure that the display on the yaw damper coupler shows N1 eng 2 0.42 |0.08. (aa) Decrease the engine 2 function generator to approximately 0.0v. 1) Make sure that the display on the yaw damper coupler shows N1 eng 2 0.0 to 0.10. (ab) Push the MENU key on the keypad. 1) Make sure that the display shows ANALOG I/O? (ac) Push the down arrow key on the keypad. 1) Make sure that the display shows DISCRETE I/O? (ad) Push the YES key on the keypad. 1) Make sure that the display shows f loc a = not sel.
(ae) Set the captain's flight director (F/D) switch on the digital flight control system mode control panel (DFCS MCP) on the P7 glareshield panel to ON.
(af) Make sure that the first officer's flight director (F/D) switch on the DFCS MCP is set to OFF.
(ag) Use the VOR/ILS ramp test set to apply a LOC radio signal of more than two dots fly right deviation on VHF navigation receiver 1. 1) Make sure that the display on the yaw damper coupler shows
f loc a = not sel. (ah) Push the APP button on the DFCS MCP.
1) AIRPLANES WITH EFIS; Make sure that VOR/LOC ARM shows on the electronic attitude indicator (EADI) on the P1 captain's main instrument panel.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10-62253 YAW DAMPER ú
22-12-01
COUPLER ú
ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 513Jul 12/00
A
737-300/400/500MAINTENANCE MANUAL
2) AIRPLANES WITHOUT EFIS; Make sure that VOR/LOC ARM shows on the flight mode annunciator on the P1 captain's main instrument panel.
(ai) Use the VOR/ILS ramp test set to decrease the LOC radio signal to zero deviation on VHF navigation receiver 1. 1) AIRPLANES WITH EFIS;
Make sure that VOR/LOC ENGAGED shows on the electronic attitude indicator (EADI) on the P1 captain's main instrument panel.
2) AIRPLANES WITHOUT EFIS; Make sure that VOR/LOC ENGAGED shows on the flight mode annunciator on the P1 captain's main instrument panel.
3) Make sure that the display on the yaw damper coupler shows f loc a = sel. (aj) Set the captain's flight director (F/D) switch on the DFCS MCP to OFF. (ak) Set the first officer's flight director (F/D) switch on the DFCS MCP to ON. (al) Push the down arrow key on the keypad. 1) Make sure that the display shows f loc b = not sel.
(am) Use the VOR/ILS ramp test set to apply a LOC radio signal of more than two dots fly right deviation on VHF navigation receiver 2.
(an) Push the APP button on the DFCS MCP.
1) AIRPLANES WITH EFIS; Make sure that VOR/LOC ARM shows on the electronic attitude indicator (EADI) on the P3 first officer's main instrument panel.
2) AIRPLANES WITHOUT EFIS; Make sure that VOR/LOC ARM shows on the flight mode annunciator on the P3 first officer's main instrument panel.
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