PHI GOM S-92 - RADAR TCAS EGPWS Flashcards
S-92 Independent position group consist of RADAR TCAS EGPWS
The “TGT” RADAR function monitors out to __ nm beyond the selected range within ___ degrees of the heading for MAGENTA or RED radar targets and sets gain to_____.
50 nm beyond the selected range
within 7.5 degrees of heading
auto gain.
The PHI S-92 has a ___in RADAR antenna.
12 in
The nose door is actually a Radome with crosshatch material to prevent interferance.
In WX/RCT mode, gain is automatically set to____. The CYAN shaded area indicate_________
Auto gain
the RADAR signal is blocked by heavy rain before it reaches it’s full range (Areas of attenuation).
With RCT on the color code no longer matches rainfall rates such as Magenta= 2 in per hour.
Is the EGPWS an additional type of radar that will paint obstacles and terrain that is seen on the radar return.
NO
The EGPWS relies on GPS position and a terrain/obstacle database.
What minimum wheel height and pitch attitude would a pilot hear the “TAIL TOO LOW” audio alert?
3 feet at 11 degrees
Voice comes from the EGPWS
Obstacles that are up to 500’ above your altitude will be painted in what color?
Below 500 is 50% yellow
500 feet and higher is 50% red.
MTM 34-111
When is the EGPWS Pop-Up Mode activated?
Pop-up mode is activated when an alert occurs but EGPWS is not displayed on any MFD.
What does Low Altitude mode do?
Low Altitude mode will desensitize the system for low altitude flight.
When would a pilot hear the audio alert
“CAUTION OBSTACLE’?
Caution occurs when 30 seconds from impact.
When would a pilot hear the audio alert
‘WARNING OBSTACLE’?
Warning occurs when 20 seconds from impact.
Describe the auto range and cell expansion mode of the EGPWS.
When an alert occurs the range is reset 5nm and the alert area becomes larger to get the pilot’s attention
What would an area of magenta indicate on an EGPWS display?
Areas where terrain elevation is not known.
Above 2000 feet what symbol is used to coincide with a TCAS ‘TRAFFIC, TRAFFIC’ visual and audio alert? What is the time to contact?
Solid Yellow Circle.
30 seconds to contact
If below 2000’, altitude separation of less than 600’ will occur in 20 seconds, or the intruder is within 600’ and .2nm.
If above 2000’, then an altitude separation of 800’ will occur in 30 seconds, or the intruder is within 800’ and .55 nm.
Which alert has priority EGPWS or TCAS?
EGPWS warnings have priority over TCAS.
The RADAR is stabilized by the _______
#1 AHRS (MTM 34-75)
