Honda HondaJet HA-420 Pilots Operating Manual page 176

Honda Aircraft Company
HA-420 SYSTEMS
POM DESCRIPTION
Wing Ice Protection System
Conditioned air from the Bleed Air Supply system is routed to L and R
Wing Anti-Ice Air Valves (WAIV) and to the Wing Anti-Ice Cross Flow
Valve (WAIXV). From the WAIVs, the air is distributed through a pair
of piccolo tubes and then vented through holes in the inboard lower wing
area and a vent on the outboard lower wing. Wing temperature sensors
are located in the inboard and outboard section of the leading edge. A
high flow mode is automatically commanded on when the system is
activated and commanded off when both outboard temperature sensors
reach a pre-determined threshold. The WAIXV is used to supply engine
bleed air to both wings when only one bleed source is available. The
system is automatically tested on the ground following the second engine
start.
The system can be manually commanded on by selecting the WING
ANTI-ICE switch ON position and de-activated by selecting the OFF
position. In the ON position, both WAIVs are commanded open, except
when operating on single bleed in the keep out zone; then a WING
ANTI-ICE UNAVAIL caution CAS message is posted. On the ground,
when the switch is selected to the ON position a CONFIG WING
ANTI-ICE advisory CAS message is posted until the wing is warm
enough to support a takeoff in icing conditions. Attempting a takeoff
with a CONFIG WING ANTI-ICE advisory CAS message will result
in activation of the takeoff configuration warning.
When the WING ANTI-ICE switch is in the NORM position, the
WAIVs automatically open when ice is detected by either ice detector,
and the system will remain active for three minutes after ice is no longer
detected.
HJ1-29000-005-001
October 30, 2016 1-160
FOR TRAINING PURPOSES ONLY