737 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 15.10.9
3 Ground Proximity System Test (SYS TEST) Switch
Push –
• momentarily on ground:
• BELOW G/S and GPWS INOP lights illuminate
• TERR FAIL and TERR TEST show on navigation displays
• PULL UP and WINDSHEAR alerts illuminate
• GLIDESLOPE, PULL UP, and WINDSHEAR aurals sound
• terrain display test pattern shows on navigation displays
• CAUTION TERRAIN aural sounds and TERRAIN caution message
shows on navigation displays.
YK995 - YQ456
• Runway Awareness and Advisory System (RAAS) selected callouts
sound.
• AIRSPEED LOW (airplanes with AIRSPEED LOW aural).
• until self-test aurals begin, on ground, above indications always occur
first, followed by these additional aurals, as described in section 15-20:
• radio altitude based alerts
• bank angle alert
• approach callouts
• windshear alert
• look ahead terrain alerts
• system test inhibited in-flight.
4 Ground Proximity FLAP INHIBIT Switch
FLAP INHIBIT – inhibits ground proximity TOO LOW FLAPS alert.
NORM (guarded position) – Normal TOO LOW FLAPS alert active.
5 Ground Proximity GEAR INHIBIT Switch
GEAR INHIBIT – inhibits ground proximity TOO LOW GEAR alert.
NORM (guarded position) – Normal TOO LOW GEAR alert active.
6 Ground Proximity Terrain Inhibit (TERR INHIBIT) Switch
TERR INHIBIT – inhibits look–ahead terrain alerts and terrain display.
NORM (guarded position) – Normal terrain alerts and terrain display active.
YK995 - YQ456
7 Ground Proximity Runway Inhibit (RUNWAY INHIBIT) Switch
RUNWAY INHIBIT – inhibits RAAS callouts and alerts.
NORM (guarded position) – Normal RAAS alerts and RAAS display active.
September 15, 2016
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