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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-015
RA and TA No-Bearing Traffic
The no-bearing RA and TA messages show on the ND when
TCAS loses the bearing of the RA or TA traffic. The bottom
directional antenna becomes an omnidirectional antenna when
the landing gear is down. When this happens, the bottom
antenna cannot find the bearing of the intruder traffic. The
bearing is NCD. Because of this, the no-bearing messages
show on the ND.
If a TA becomes no-bearing traffic, an amber TA with the range,
altitude, and vertical motion arrow shows on the ND. If an RA
becomes no-bearing traffic, a red RA with the range, altitude,
and vertical motion arrow shows on the ND. Only two nobearing
traffics may show.
TCAS - NAVIGATION DISPLAY
EFFECTIVITY
SHZ ALL 34-45-00
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-015
TCAS - NAVIGATION DISPLAY
TCAS - NAVIGATION DISPLAY
EFFECTIVITY
SHZ ALL 34-45-00
Page 41
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-015
General
These are the two types of TCAS vertical resolution advisories
that can show on the attitude indicator (AI):
* TCAS RA - down advisory
* TCAS RA - up advisory.
These symbols only show for an RA when:
* The function selector on the ATC control panel is in the TA/
RA position
* The TCAS communicates with threat airplanes that give their
altitude.
Description
The red advisories show on the attitude display. They tell the
flight crew to avoid some pitch movements.
The flight crew uses the advisories to avoid a possible collision
with threat airplanes.
TCAS - ATTITUDE INDICATOR DISPLAY
EFFECTIVITY
SHZ ALL 34-45-00
Page 42
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-016
TCAS - ATTITUDE INDICATOR DISPLAY
TCAS - ATTITUDE INDICATOR DISPLAY
EFFECTIVITY
SHZ ALL 34-45-00
Page 43
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-016
General
Aural advisory messages occur during these conditions:
* Traffic advisories (TA)
* Resolution advisories (RA)
* TCAS system tests.
Traffic Advisory Aural
When a traffic advisory occurs, the aural message TRAFFIC
TRAFFIC comes on. This message tells the flight crew to
monitor the display for intruder traffic.
Resolution Advisory
These are the two types of aural messages that can come on
during a resolution advisory (RA):
* Preventive action RA
* Corrective action RA.
SHZ 001-003
Preventive Action RA
This type of RA occurs when at the closest point of approach
(CPA) the present vertical speed results in a safe altitude
separation from the threat airplane. When this happens, the
aural advisory is MONITOR VERTICAL SPEED - MONITOR
VERTICAL SPEED. This message tells the flight crew to do
these things:
* Maintain the flight path
* Do not fly into the area of RA pitch symbol on the ADI
* Maintain the vertical speed rate.
SHZ 009-999
Preventive Action RA
This type of RA occurs when at the closest point of approach
(CPA) the present vertical speed results in a safe altitude
separation from the threat airplane. When this happens, the
aural advisory comes on.
These are the aural messages for the preventive action RA:
* MONITOR VERTICAL SPEED
* MAINTAIN VERTICAL SPEED, MAINTAIN
* MAINTAIN VERTICAL SPEED, CROSSSING MAINTAIN.
TCAS - AURAL MESSAGES
EFFECTIVITY
SHZ ALL 34-45-00
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D633A101-SHZ1 Oct 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-018
SHZ 009-999 (Continued)
The preventive action RA messages tell the flight crew to do
these things:
* Maintain the flight path
* Do not fly into the area of RA pitch symbol on the ADI
* Maintain the vertical speed rate.
SHZ 001-003
Corrective Action RA
This type of RA occurs when the altitude separation at the CPA
is not safe. These RA aural advisories tell the flight crew to take
　
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