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green light bands around the dial,“Fly-To”and “Fly-
Away-From”commands are displayed coinciding with
the required vertical rate. Maneuver the aircraft
promptly and smoothly in response to the Resolution
Advisory.
Some of the typical Resolution Advisories shown on
the RA/VSI will require a maneuver by the crew
while others will warn against maneuvering.A typical
TCAS II maneuver requires crew response within 5
seconds and G-forces of ± .25 G.This force is similar
to that experienced when initiating an enroute climb
or descent. Because of this G-force requirement, the
response to the RA cannot be flown using the autopilot.
The autopilot must be disconnected prior to
responding to the RA.
The following diagrams illustrate typical TCAS II
encounters showing intruder traffic on a display and
the corresponding resolution on the RA/VSI.
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Collision Avoidance System User’s Manu a l
How to
Fly Typical
TCAS II
Commands –
Change
6.04a
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Indications
and Voice
Announcements
Change 6.04a
Comments
“Climb, Climb, Climb.”
Situation:
The intruder is ahead at 12:00 o’clock,200 feet
below your altitude.
Crew Response:
Promptly and smoothly establish a climb rate of 1500
feet per minute.
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Indications
and Voice
Announcements
Change 6.04a
Comments
“Monitor Vertical Speed,
Monitor Vertical Speed.”
Situation:
One intruder is ahead at 12:00 o’clock,500 feet
above your altitude. Another is 500 feet below your
altitude.
Crew Response:
Remain in level flight.Do not climb or descend.
“Monitor Vertical Speed.”
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Indications
and Voice
Announcements
Change 6.04a
Comments Situation:
The intruder is ahead at 12:00 o’clock,500 feet
below your altitude and f lying level.
Crew Response:
Do not descend.
“Traffic, Traffic”
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Collision Avoidance System User’s Manu a l
Situation:
The intruder is ahead at 12:00 o’clock,beyond 5
miles,200 feet below your altitude.
Crew Response:
You do not maneuver on the Traffic Advisory symbol.
Attempt to visually acquire the intruder and be prepared
to maneuver if the TA changes to an RA.
Indications
and Voice
Announcements
Change 6.04a
Comments
“Monitor Vertical Speed.”
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Indications
and Voice
Announcements
Change 6.04a
Comments Situation:
The intruder is ahead at 12:00 o’clock,400 feet above
your altitude You are already climbing at 2000 feet
per minute.
Crew Response:
Maintain climb at present rate.
Crew Response:
Promptly and smoothly establish a descent rate of
1500 feet per minute.
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Situation:
One intruder is ahead at 12:00 o’clock,200 feet
above your altitude.
“Descend, Descend,
Descend.”
Indications
and Voice
Announcements
Change 6.04a
Comments
“Climb; Climb Now,
Climb, Climb Now.”
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Collision Avoidance System User’s Manu a l
Situation:
The intruder is ahead and above and has changed
from level flight to a rapid descent after TCAS issued
a descend RA. TCAS is now changing that to a climb.
Crew Response:
You are expected to initiate the change from a
descent to a climb maneuver within 2.5 seconds with
an increase in G-force to .35 Gs.
Indications
and Voice
Announcements
Change 6.04a
Comments
“Clear of Conflict”
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Situation:
The intruder has passed behind and is now 600 feet
below your altitude. It is no longer a threat.
Crew Response:
Return promptly to the previous ATC clearance.
Indications
and Voice
Announcements
Change 6.04a
Comments
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TCASII/ACASII Collision Avoidance System User’s Manual(4)
