Honeywell EGPWS MK V - Page 116

Mark V and Mark VII EGPWS Pilot’s Guide
Smart Landing
TM
060-4241-000
110 Rev H, August 2011
Detectable Error for Various Temp Deviations
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
0 500 1000 1500 2000
Size of Detected Error (Ft)
Height Above Field (Ft)
ISA
ISA +/- 10
ISA +/- 20
ISA +/-30
Below
Transition
Altitude
Continued
The Altimeter Monitor uses the following inputs: GPS data
(including Altitude, Vertical Figure of Merit, Non-Isolatable
Satellite Failure (NISF), Operating Mode, Horizontal Integrity
Limit, Number of Satellites)
and ADC data (Corrected
Barometric Altitude, Pressure Altitud
e, and Static Air
Temperature).
The Below Transition Altitude - Altimeter Monitor
annunciation is generated when the following conditions are
met:
• GPS Altitude and Vertical Figure of Merit (VFOM) are
valid and have passed internal reasonableness checks
• GP
S is not in altitude aiding mode, the number of
satellites tracked is 5 or greater, a non-isolatable satellite
failure (NISF) does not exist, and GPS Horizontal
Integrity Limit (HIL) is valid
• Corrected Barometric Altitude and Static Air Temperature
are valid
• EGPWS Runway Database is valid
• Aircraft Altitude is less than the Transition Altitude for
more than 30 seconds OR Height Above Field is less than
1500 feet. The transition altitude is obtained from the
EGPWS runway database for the destination runway.
•
Aircraft is within 20 nautical miles of the EGPWS
Selected destination runway
• Height above field is less than 5000 feet
• Airport is not indicated as QFE, altimeter setting is not
QFE, and QFE program pin is not selected
• Radio Height is greater than 600 feet