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to allow RAAS to function, or the aircraft is at an airport that has not
been validated for RAAS in the EGPWS Terrain Database.
“Runway Awareness Inhibited” RAAS software enabled, but the advisories have been inhibited
with the activation of an external discrete.
“Runway Awareness R-T-O” RAAS software enabled and functioning, but RAAS has detected
a Rejected Take-Off condition. To clear this message, the aircraft
must be taxied off the runway area
“Runway Awareness INOP” RAAS software enabled but function is inoperative.
060-4241-000 • Rev. E - December 2003
MK V & MK VII EGPWS Pilot Guide 89
RAAS status can also be displayed on the Terrain Display. This is
active only when the aircraft is on the ground. The procedure requires
the flight crew to select the terrain display followed by a
change in the displayed range (to a higher or lower range). RAAS
status is annunciated for two sweeps of the Terrain Display. This
feature is available on all aircraft, but is primarily intended for
those aircraft where the flight crew does not perform an EGPWS
self-test. The displayed status messages are as follows.
Operational
Availability
Continued
Audio Message Conditions
RAAS-OK-FT (green) RAAS software enabled, functioning, has good position information,
and is at a validated airport. Distances annunciated in feet.
RAAS-OK-m (green) RAAS software enabled, functioning, has good position information,
and is at a validated airport. Distances annunciated in metres.
RAAS-N/AVBL (amber) RAAS software enabled, but the system either has no position
information, the accuracy of the position information is insufficient
to allow RAAS to function, or the aircraft is at an airport that has not
been validated for RAAS in the EGPWS Terrain Database.
RAAS-INH (amber) RAAS software enabled, but the advisories have been inhibited
with the activation of an external discrete.
RAAS-RTO (green) RAAS software enabled and functioning, but RAAS has detected
a Rejected Take-Off condition. To clear this message, the aircraft
must be taxied off the runway area.
RAAS-INOP (amber) RAAS software enabled but function is inoperative.
RAAS Self-Test Display Messages
SECTION 7
Frequently
Asked
Questions
Q. How do I know that the RAAS is enabled?
A. Perform an EGPWS self-test or select the Terrain Display followed
by a change in the displayed range (to a higher or lower
range). RAAS status is annunciated for two sweeps of the Terrain
Display. These functions available only when aircraft is on the
ground.
Q. How can the flight crew determine which RAAS database is
currently loaded in the EGPWS computer ?
A. The RAAS status message on the Terrain Display during the
EGPWS self-test (see last question) also displays the version of
the currently installed database.
060-4241-000 • Rev. E - December 2003
90 MK V & MK VII EGPWS Pilot Guide
Frequently
Asked
Questions
Continued
Q. How can the flight crew determine if RAAS will work at the
destination airport upon arrival?
A. RAAS status can be displayed on the Terrain Display only when
the aircraft is on the ground. The crew should check in advance
if the destination airport is included in the RAAS database - see
answer to the next question. Once on the ground at the destination
airport, RAAS status can be displayed on the Terrain Display.
Q. How can the flight crew determine what airports are enabled
for RAAS?
A. Details of the specific airports included in the RAAS database
and procedures for operators to acquire the latest RAAS database
are provided on the Internet at www.egpws.com. A telephone
number for voice contact is included as well.
Q. Who do I contact for help with a RAAS database issue (such as
adding an airport to the RAAS database), or a problem encountered
in the operation of RAAS at a particular airport?
A. An online form for RAAS discrepancies is provided on the
Internet at www.egpws.com. A telephone number for voice contact
is included as well.
877-436-2005 (In U.S.)
602-436-2005 (Outside U.S.)
Q. How do I know what units are being used for the RAAS distance
related advisories?
A. This information is provided during the EGPWS self-test audio
message or on the RAAS status message on the terrain display.
Q. How does RAAS account for temporary runway closures?
A. RAAS does not include knowledge of prevailing Notice to Airmen
(NOTAM) and therefore factors such as closure of runways
is not reflected by advisories. Crews are assumed to be cognizant
of prevailing NOTAM and Automatic Terminal Information Service
　
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