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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK V GPWC ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
3000
2000
HEIGHT ABOVE TERRAIN (FT)
1000
0
*65 FT NOMINAL ON CLIMBING
SINK RATE (FPM)
Mode 1 - Excessive Descent Rate Figure 4
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
2500
2000
HEIGHTABOVE1500 TERRAIN(FT)
1000
500
0 0 1000 2000 3000 4000 5000 6000 7000 8000 9000
CLOSURE RATE (FPM)
MODE 2A - FLAPS NOT IN LANDING CONFIGURATION
600 HEIGHTABOVE400 TERRAIN800
(FT) 200
HEIGHT
ABOVE
500
TERRAIN
0
(FT)
0 400 800 1200
BAROMETRIC RATE (FPM)
MODE 2B - LOWER LIMIT
0
A0 1000 2000 3000 4000 CLOSURE RATE (FPM)
MODE 2B - FLAPS IN LANDING CONFIGURATIONMode 2 - Excessive Closure RateFigure 5
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A 737-300/400/500MAINTENANCE MANUAL
6. Ground Proximity Warning System Control Module (Fig. 1)
______________________________________________
A. The ground proximity warning control module is located on the first officer's instrument panel. It consists of an amber INOP indicator light, a SYS TEST switch, a guarded and lockwired FLAP INHIBIT switch and a guarded & lockwired GEAR INHIBIT switch. The INOP indicator light comes on when the monitor circuit in the computer senses a fault condition. The TEST switch provides a confidence check of the system, either in flight or on the ground. The FLAP INHIBIT switch enables the pilots to simulate a flap down condition and the GEAR INHIBIT switch enables the pilots to simulate a gear down condition when the switches are set to INHIBIT position. When placed in the INHIBIT position, the TOO LOW-FLAPS and TOO LOW-GEAR warnings are inhibited.
7. Warning Speaker
_______________
A. The aural warning signals from the GPWC are sent to the remote electronic unit (Shelf 1, equipment rack No. 2) to be processed. The aural warnings are then broadcast over the cockpit speakers (pilots overhead panel P5) and the flight interphone system.
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