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Honeywell EGPWS MK V Pilot's Manual page 116

Enhanced ground proximity warning system
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Table of Contents
Below
Transition
Altitude
Continued
TM
Smart Landing
110
Detectable Error for Various Temp Deviations
20000
18000
16000
14000
12000
10000
8000
6000
4000
2000
0
0
500
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 Altitude, 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
• GPS 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
Mark V and Mark VII EGPWS Pilot's Guide
1000
1500
Size of Detected Error (Ft)
ISA
ISA +/- 10
ISA +/- 20
ISA +/-30
2000
060-4241-000
Rev H, August 2011

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