Honda HondaJet HA-420 Pilots Operating Manual page 215

Honda Aircraft Company
HA-420 SYSTEMS
POM DESCRIPTION
Primary Air Data and Temperature
In addition to the basic air data parameters, two Multi-function Air Data
Probes also provide angle of attack (AoA) data for the Stall
Warning/Protection System (SWPS). On-side air data and
attitude/heading data are normally displayed on each PFD. If one air
data source is lost, data from the other is automatically displayed. Cross-
side data can also be selected manually using the PFD soft keys.
When both PFDs are displaying data from the same source, or if cross-
side data is used, an annunciation is provided on the PFDs. A flag is also
posted if there a miscompare between the two air data systems.
Barometric pressure setting is adjusted using the BARO SET knob and is
displayed below the altimeter tape. Barometric pressure units are
selectable, through the CDU, in inches of mercury (in Hg) or
hectoPascals (hPa).
Airspeed/Mach and altitude bugs can be set using the SPD and ALT
knobs on the Mode Control panel.
Temperature data is provided by two Total Air Temperature sensors in
each engine. Static Air Temperature and deviation from ISA temperature
are displayed in the lower left of each PFD.
Primary Attitude and Heading Data
Two primary GRS 77 AHRS units slaved to dual GMU 44
magnetometers provide aircraft attitude and stabilized magnetic heading
data. Each AHRS uses inputs from one Magnetometer, one air data
input, and both GPS data inputs. On-side AHRS data is normally
displayed on each PFD. If one AHRS source is lost, data from the other
is automatically displayed. Cross-side data can also be selected manually
using the PFD soft keys.
HJ1-29000-005-001
October 30, 2016 1-199
FOR TRAINING PURPOSES ONLY