Warning Systems -Controls and Indicators
Predictive Windshear Display and Annunciations
Predictive Windshear Symbol
Displayed (red and black) – Predictive windshear alert active.
Shows windshear location and approximate geometric size (width and depth).
Symbol, radials, and weather radar returns automatically show when:
.
predictive windshear alert occurs, and
.
neither pilot has WXR display selected, and
.
in expanded MAP, center MAP, VOR, or APP modes. When terrain display is active, weather radar display replaces terrain display.
Predictive Windshear Symbol Radials
Displayed (amber) – Predictive windshear alert active. Extend from predictive windshear symbol to help identify location of windshear event
WINDSHEAR Annunciation
WINDSHEAR (amber) – predictive windshear caution active. WINDSHEAR (red) – predictive windshear warning active. Shows in all navigation display modes.
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Warning Systems -Controls and Indicators
TCAS Controls (Transponder Panel)
YA613, YA626, YC411, YC413
YA686 - YA809, YD651 - YK104
YC153, YC154
Transponder Mode Selector YA613, YA626, YC411, YC413
TA (traffic advisory) – enables the display of traffic advisory (TA) targets. TA/RA (resolution advisory) – enables the display of traffic advisory (TA) and resolution advisory (RA) targets.
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15.10.12 June 1, 2005
Warning Systems -Controls and Indicators 737 Flight Crew Operations Manual
Transponder Mode Selector
YA686 - YC154, YD651 - YK104
TA (traffic advisory) ONLY – enables the display of traffic advisory (TA) targets.
TA/RA (resolution advisory) – enables the display of traffic advisory (TA) and resolution advisory (RA) targets.
Absolute Altitude Display Selector YC153, YC154
PRESS – displays absolute altitudes of TCAS targets while switch is pressed.
Altitude Range Switch YC153, YC154
Allows shifting of TCAS coverage up and down from baseline:
.
Above (ABV)– sets TCAS display from 2700 feet below to 7000 feet
above own airplane
.
Normal (N) – sets TCAS display from 2700 feet below to 2700 feet above
own airplane
.
Below (BLW)– sets TCAS display from 7000 feet below to 2700 feet
above own airplane.
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Warning Systems -Controls and Indicators 737 Flight Crew Operations Manual
Intentionally
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15.10.14 March 28, 2005
737 Flight Crew Operations Manual
Introduction
Aural, tactile and visual warning signals alert the flight crew to conditions
requiring action or caution in the operation of the airplane. The character of the
signals varies, depending upon the degree of urgency or hazards involved. Aural,
tactile, and visual signals are used singularly or in combination to simultaneously
provide both warnings and information regarding the nature of the condition.
Mach/airspeed warnings, landing gear warnings, takeoff configuration warnings,
windshear warnings, and ground proximity warnings are discussed in this section.
Cabin altitude warning is discussed in the Air Systems chapter, and autopilot and
autothrottle disconnect warnings are discussed in the Automatic Flight chapter.
The conditions which excite the fire warning bell are discussed in the Fire
Protection chapter.
YC153, YC154
Many of the flight instrument display symbols and annunciations listed in this
chapter also appear on the Head Up Display (HUD) System. Refer to Chapter 10,
Flight Instruments, for HUD display symbol descriptions.
Conditions which require the immediate attention of the flight crew are indicated
by red warning lights located in the area of the pilots’ primary field of vision.
These lights indicate engine, wheel well, cargo, or APU fires; autopilot,
autothrottle disconnects; and landing gear unsafe conditions.
Conditions which require the timely attention of the flight crew are indicated by
amber caution lights.
Blue lights inform the flight crew of electrical power availability, valve position,
equipment status, and flight attendant or ground communications. Blue lights are
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